Unimog U 500 with 4-wheel steering defies heavy snowfall in the Austrian Vorarlberg area

By | Published Friday, 20 January 2012

The Mercedes-Benz Unimog is in all-year-round use in the Austrian Vorarlberg region: snow clearing, road and crash barrier cleaning as well as grass verge mowing duties have been undertaken for many years now with the help of the "Universal-Motor-Gerät", or "Universal Motor Device", commonly known as the Unimog. In early 2012, the tropical cyclone "Andrea" brought particular challenges for the Unimog fleet operated out of the Felsenau depot near Feldkirch/Frastanz, which is responsible for road maintenance services on some two-thirds of the roads in the Vorarlberg region. More than ten metres of fresh snow fell on the Arlberg pass, the most important link between Austria's most westerly region and Innsbruck, taking the highway maintenance authorities by surprise. The situation was similarly dramatic in the Montafon region, over towards the Silvretta high Alpine road, in the Great Walser Valley and on the Flexen route towards Zürs and Lech. The only vehicle up to the task was the 210 kW (286 hp) Unimog U 500 fitted with a Schmidt 105 front-end snow cutter – clearing width 2.60 metres. This combination proved extremely effective in clearing the exceptional volume of snow from the roads, according to Helmut Feuerstein, technical director of the Felsenau depot.


4-wheel steering for exceptional manoeuvrability in snow

The metre-high banks of snow on either side of the road demand precision work from the Unimog's driver. It is in situations like this that the transferable steering system VarioPilot and the 4-wheel steering system really come into their own. With 4‑wheel steering the Unimog becomes considerably more manoeuvrable than it already is, while its turning circle is reduced by up to 30 percent. It means that the snow cutter can clear bends far more quickly these days. Before the advent of 4-wheel steering, it was necessary to begin by cutting extra bays into a bend in order to achieve the necessary curve radius. It was a long-winded process that involved a lot of turning and forward and backward manoeuv res. Mercedes-Benz Special Trucks now offers this unique technology as a variant for Unimog, Econic and all municipal and fire-fighting vehicles.

The Unimog fleet at the Felsenau depot comprises two U 500 models with 4-wheel steering as well as a third U 500. Then there are a U 1000 and a U 130, plus a 29-year-old U 406, known affectionately by the Felsenau team as the "Buffalo". It is apparently indestructible and can be fitted with various attachments and implements to cope with even the trickiest operational situations that can arise on Alpine roads. Working in the heavy snow that fell earlier this year, the six Unimog vehicles were once again crucial to delivering the broad spectrum of activities demanded of the Felsenau fleet.

Best practice example for winter maintenance specialists from across Europe

The exemplary way in which the snow on the Arlberg was cleared – and the cost-effectiveness of this approach for the operator – also became a talking point among Alpine winter maintenance experts from across Europe. A stream of experts with an interest in this field have since made their way to the Vorarlberg to see the benefits of a Unimog with 4-wheel steering being demonstrated on the Arlberg Pass. Even the road maintenance service experts from Andorra, who have been Unimog customers for many years, were persuaded to come along and see for themselves the superior performance of the Unimog with 4-wheel steering. A demonstration of its capabilities on the Arlberg so convinced Andorra's representatives that they immediately placed an order for six Mercedes-Benz Unimog U 500 with 4-wheel steering.
Credits: Daimler AG

Copyright © 2012, Mercedes-Benz-Blog. All rights reserved.

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Free app for FleetBoard telematics system now available for buses

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Daimler FleetBoard is the first supplier of telematics solutions to offer a fleet management and driving analysis app for the Apple iPhone and iPad. Operators can use it to control their fleet of buses or coaches at any time and from any location. The trip recorder also makes it possible to display the most recent journey made. The app enables operators to monitor how their vehicles are being used, their drivers' working hours, the fuel consumption of their buses and coaches and the drivers' driving style. It is even possible to show the status of doors and loading ramps. To use the FleetBoard app it is necessary to have a vehicle equipped with FleetBoard, with a FleetBoard service contract. The new FleetBoard app is available for a limited period free of charge from the App Store. The app has already been available for some time now for trucks and vans.


Until now, the telematics system for buses has been known as Omniplus BusFleet. The bus-specific telematics system for rural-service buses, touring coaches and urban buses from telematics provider Daimler FleetBoard GmbH has been available and undergoing further development for some weeks now. Trust is important but, as fleet operators know, transparency is even better - and an indispensable factor if a company is to operate economically and efficiently. The bus-specific FleetBoard fleet management system provides effective support here. Fleet operators are able to take advantage of the FleetBoard app for buses, even if they are out and about themselves.

The FleetBoard system can be fitted ex factory in any fully equipped Mercedes-Benz and Setra bus or coach, or – as also in the case of buses and coaches made by other manufacturers – retrofitted. Several bus and coach companies are already working successfully with FleetBoard and making extensive use of the bus telematics system in their daily operations. "We have more than ten years' experience of working with commercial vehicle fleets. Especially when diesel fuel prices are high, our customers also appreciate the way in which FleetBoard can help make significant reductions in fuel consumption" commented Markus Lipinsky, Managing Director of Daimler FleetBoard GmbH.

Mapping: keeping tabs on buses around the world at all times

The fleet manager can locate the current whereabouts of a vehicle on a digital map that can be called up on any computer with internet access, or track its route at 30-second intervals. It is possible to switch between map and satellite views or to select a combination of both. Mapping can also be used to show important occurrences during the course of the trip, or to display warning and status messages. A geofencing function makes it possible to define specific areas where entry and exit are monitored: as well as providing resource planning information on both the bus and the driver, this is also a significant security feature in the event that the vehicle should be stolen.

Driver analysis: evaluation of driving style and realisation of potential savings
FleetBoard can help a company to optimise its economic efficiency, as the right driving style can reduce both fuel consumption and wear and tear by up to 10%. FleetBoard interprets driver and vehicle-related data, taking the assessment of driving style and the complexity of the route into consideration in the process. The underlying data relating to vehicle speeds, engine speeds, hard braking and other such information provide an objective basis for conclusions about the way the bus or coach is being handled. Such monitoring also provides feedback for the driver as to what measures he can take to improve his driving style and, ultimately and most importantly, to become a safer driver. Internal investigations by Daimler have shown that improving driving style to a score of 9.0 or more can reduce accident rates by up to 90%.

Trip recording: transparency in everyday operations

The data thus accumulated makes it possible to ascertain precisely the times and places at which the bus has been stationary or on the move. The company can get reliable information about whether the doors were open or closed at any particular point. This information can then be used, for example, to deal with customer issues by establishing whether a specific bus was on time and available for boarding at a given stop. Similarly, bus operators are able to produce data showing the use of the access ramp by passengers with restricted mobility.

The driver is able to use preset message buttons to send standardised messages back to the bus depot. In return, the company can also send messages to the display in the bus's instrument cluster.

Time Management: automatic capture and archiving of tachograph data

The time management function facilitates optimum planning of working hours on the basis of drivers' rest periods and remaining driving time. All relevant data can then be transferred automatically into a payroll system. With FleetBoard, the download of driver card data from the bus that is a required by law can be undertaken regardless of the time of day or the location of the vehicle. FleetBoard also allows the remote transfer of mass storage data from the digital tachograph on board the bus. Particularly in cases where a bus is away from its base for longer periods, this can bring significant savings in terms of both time and costs.

Service: evaluation of operating data and optimised maintenance scheduling

All key bus operating data, such as mileage or tank fill level, are displayed via FleetBoard. The system will also send selected warning messages from the vehicle, so allowing any necessary repairs to be made in a prompt and targeted fashion. Further messages transmitted by the vehicle allow evaluation of factors such as retarder use, or how long auxiliary heating systems or air conditioning are being kept on for. This in turn allows conclusions to be drawn about the condition of the vehicle and thus of its economic efficiency and the level of comfort provided. FleetBoard allows fleet operators to plan efficiently for any services that are due, or any time-consuming vehicle checks that need to be made.

The vehicle data are recorded via a standardised FMS interface in the bus and stored in the FleetBoard on-board computer before being transmitted. The transfer of data takes place via GPRS to a central FleetBoard server. Registered FleetBoard users have secure access via the internet to the bus client containing all the data and evaluation results.

About FleetBoard

Daimler FleetBoard GmbH is one of Europe's leading companies in the field of vehicle telematics systems. Systems and services are designed for use by fleet managers, logistics managers and drivers of truck, bus and van fleets of all makes and spanning all sectors of industry. FleetBoard has a proven reputation of many years' standing as a fleet management system that offers improved economic efficiency and transparency. It provides user-friendly technology that assists drivers in their daily work. As a wholly owned subsidiary of Daimler AG, based in Stuttgart, Germany, the company has been tested and certified by DEKRA in accordance with DIN EN ISO 9000:2008.
Credits: Daimler AG

Copyright © 2012, Mercedes-Benz-Blog. All rights reserved.

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Quiet and emissions-free driving in the city: Vito E-Cell vans cover 650,000 km in customer use

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Quiet, emissions-free and practical – 100 battery-driven electric Mercedes-Benz Vito E-CELL vans have proven their worth in customer use in Berlin and Stuttgart. The world’s first van fitted with an electric drive system ex factory has been taking to the roads in the German capital since autumn 2010, and in Stuttgart since the beginning of 2011. The two projects, each with 50 Vito E-CELLs, are intended to run over a period of four years. The final reports scheduled for the end of the promotional period indicate a positive result: the Vito E-CELL is ideally suited to use on inner-city routes. The vehicle has made the vision of emissions-free driving in commercial traffic a reality. A total of 230 Vito E-CELL vans are now in use in several model regions.


Automotive industry, commercial enterprises, energy suppliers and policy makers in successful collaboration

The projects serve to demonstrate how the automotive industry, together with commercial enterprises, energy suppliers and policy makers, can work together to provide crucial impetus to advance electric mobility in Germany. The German Federal Ministry for the Environment and Nature Conservation is lending its support to the Electrification of Mercedes-Benz Small Vans in Development and Production project (EMKEP) in Berlin. In Stuttgart, the Integrated Concept for Sustainable Electric Mobility project (IKONE) is being funded by the German Federal Ministry of Transport, Building and Urban Development. The two promotional initiatives are part of the German federal government’s second economic stimulus package.

Intelligent charging technology utilises green electricity

Mercedes-Benz and energy suppliers Vattenfall (Berlin) and EnBW (Stuttgart) have begun the implementation of new technologies in vehicles and their charging systems at both locations. The energy suppliers, for instance, have now provided charging stations to operators at their depots. The batteries of Vito E-CELL vans are recharged at these locations outside of operating hours.

Intelligent charging technology is used, based on the Smart Charge Communication Unit (SCCU) in the Vito E-CELL. The technology optimises the CO2 balance of the vans with certified green electricity, or even surplus wind energy (“Wind-to-Vehicle/W2V”). The charging technology can also be programmed to lower electricity tariffs to impact operating costs favourably. Where operators use several Vito E-CELL vans, the charging procedures are graded through a process of local charge management (LLM, in German: Lokales Lastmanagement) to ensure that the grid capacity is not overextended.

Highly diverse areas of application

Mercedes-Benz delivered the first vehicles for field testing to testing partners in Berlin at the beginning of September 2010, and in Stuttgart in January 2011. The areas of application are highly diverse: courier, express and package service providers (KEP, in German: Kurier-, Express- und Paketdienstleister), plant transportation in large corporations, service vehicles for plant maintenance, customer service, and assembly and internal transport within companies. The varied topography was a key factor in the selection of the regions. In contrast to the largely flat terrain of the greater Berlin area, the differences in elevation within the Stuttgart metropolitan area are as much as 350 meters, which presents a real stamina test for the range, recuperation performance and drive properties of the Vito E-CELL.

All-round positive assessment of Vito E-CELL van in daily use by customers and drivers

In both regions, the drivers’ assessment of the Vito E-CELL has been highly positive. Characteristics of drive performance, tractive force, steady acceleration without shifting gears and continuous braking were all rated favourably. Drivers also praised the quiet running. The sole drawback of a quiet drive system is that other road users do not always hear the van approaching; according to driver opinion, this necessitates increased attentiveness and an especially anticipatory driving style.

Range typically not exploited to the full

Initial concerns regarding a too limited range were not substantiated in practice. The vehicles proved capable of covering at least 80 km on a full battery charge, including in winter, which in most cases is a sufficient range. Specifically, this concerns KEP applications with fixed routes, trade companies, supply and municipal companies, and general use within the inner-city environment and within corporate facilities. In a survey conducted during testing in Stuttgart, for example, drivers rated the range of the Vito E-CELL as either good or satisfactory. The fact that the challenging topography of the region fails to limit the on-the-road capabilities of the Vito E-CELL was one of the key findings in field testing.

The charge level of the batteries is a key indicator of range. In Berlin, for instance, this typically fluctuated between 95 and 25 percent of available capacity. This indicates that the maximum range of the Vito E-CELL is seldom fully utilised. Comparatively short charging times of between one and three hours are thus the norm in both regions.

Top speed sufficient, drivers highly motivated

The speed of the Vito E-CELL is electronically limited to 89 km/h to preserve a maximum range. This allows the vans to be driven with ease within the flow of truck traffic on occasional trips on the autobahn. Often, the maximum speed is not reached: in Berlin, for instance, only 30 percent of electric vans were reported to reach top speed on a daily basis. Analyses revealed that, in most cases, the speed of the Vito E-CELL did not exceed 55 km/h in both cities. Speeds were largely in the 15 to 30 km/h range.

Technical design of the Vito E-CELL

The Vito E-CELL is based on the mid-length Vito panel van. With a load capacity of up to 900 kg and an unmodified usable load compartment, the Vito E-CELL is suitable for commercial applications without any restrictions. The bodywork as such remains unaffected.

The electric engine, power electronics, converter and AC/DC charger are housed beneath the bonnet. The electric engine develops 60 kW, with a peak torque of 280 Nm. The power is transferred to the front wheels. The high-performance and durable lithium-ion traction batteries are located beneath the load compartment floor. The nominal voltage is 360 V, with a capacity of 36 kWh.

The maximum speed is limited to 89 km/h to maximise the range, which according to NEDC is around 130 km. This enables the Vito E-CELL to keep pace with the flow of truck traffic on the autobahn. The vehicle accelerates quickly from 0 to 50/80 km/h in just 6.5/11 seconds.

Power supply is via charging stations at fleet depots. The batteries of the Vito E-CELL are charged at a mains voltage of 380/400 V, a process that takes a maximum of six hours. Later, charging will also be possible at a mains voltage of 230 V. Furthermore, the batteries are also charged while the vehicle is under way, through recuperation, in which brake energy is converted into power. Back-up for the Vito E-CELL during the two field tests was provided by the local subsidiaries. Like all Mercedes-Benz vehicles, the Vito E-CELL is also fully integrated into the Star Diagnosis diagnostics system.

Fully fledged safety features, successful crash tests

In contrast to other electric vehicles, the Vito E-CELL is equipped with fully fledged safety features, including ESP. Additionally, the batteries themselves are protected by a crash element. If the airbag is triggered, the high-voltage technology is disabled automatically. The Vito E-CELL has impressively demonstrated its high safety standards in crash tests.

Numerous awards for the Vito E-CELL

The Mercedes-Benz Vito E-CELL has been awarded numerous distinctions by many independent panels, including the “Postal Technology International Award 2010” and “Green Commercial Vehicle of the Year” award. In 2011, the Vito E-CELL was awarded the “Alternative Drive Systems” innovation prize in the “KEP Van of the Year” event, the “Baden-Württemberg Environmental Technology Prize” and the Design Award at the Michelin “Challenge Bibendum”, one of the world’s largest forums for sustainable mobility.

400 Vito E-CELL vans in 2011, further model variants

The greatest distinction achieved by the Mercedes-Benz Vito E-CELL is the demand for the vehicle among customers. In 2011, Mercedes-Benz manufactured some 400 Vito E-CELL vans in its Vitoria plant in the Basque region in Spain. There, the Vito E-CELL is manufactured on the same assembly lines as all other Vito vans. This professional standard of manufacturing is a crucial factor for acceptance among commercial customers.

Mercedes-Benz Vans has produced a series of 2000 E-CELL vehicles since 2011. The popularity of the electrically driven van is set to receive a further boost with additional model variants for even greater practice- and customer-oriented purposes. Since the Vito E-CELL has an EU type approval, no monitoring organisation assessment is required for licensing within the EU, and special directives for high-voltage technology are also not applicable.

Meanwhile, field testing continues in Berlin and Stuttgart. The vehicles are designed for four years of use, with a distance of up to 80,000 km per vehicle. Owing to the high levels of demand and acceptance experienced, it proved possible as early as the testing phase to deploy additional vehicles in other model regions of Germany. A total of 230 Vito E-CELL vans have taken to the road as part of the promotional initiatives, with a distance of approximately 650,000 km covered to date. Meanwhile, Mercedes-Benz is preparing to deploy the Vito in other regions of Germany, and in most western European countries as well.

Credits: Daimler AG

Copyright © 2012, Mercedes-Benz-Blog. All rights reserved.

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Best Goods for Turkish Fruit Wholesale Merchant: 150 Mercedes-Benz Trucks for Delivery of Fresh Citrus Fruits

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Daimler’s subsidiary Mercedes-Benz Türk has reeled in another major sale. By placing an order for 150 Mercedes-Benz Actros 1844 LS trucks, Turkish fruit and vegetable wholesaler Cekok Gida continues to put its trust in the dependability of Mercedes-Benz trucks. The food company relies primarily on Mercedes-Benz Actros trucks, which make up about 90 percent of the firm’s total fleet of more than 240 vehicles. In addition to playing a major role in producing citrus fruits and other products and supplying them to wholesale markets in several large Turkish cities, Cekok Gida exports its high-quality goods especially to the member states of the European Union.


“We’re delighted that Mercedes-Benz Türk has once again posted a major three-figure order for the Mercedes-Benz Actros,” says Wolf-Dieter Kurz, President and CEO of Mercedes-Benz Türk. “Because Turkey is an essential sales market for Mercedes-Benz Trucks, we want to continue to boost sales here substantially in the future.” Following the sale of more than 200 Actros trucks to the chocolate manufacturer Tören Gida in November 2011, this constitutes another major order for the Turkish subsidiary.

At the symbolic handover of two Actros 1844 LS trucks in Istanbul, Ilhan Cekok, CEO of Cekok Gida, reiterated the reasons for the investment decision and expressed his trust in the brand with the star. “The great service network, low operating and maintenance costs, a high resale value, and especially the excellent partnership with Mercedes-Benz were the decisive reasons why we decided to add more Actros trucks to a fleet that already contained many Mercedes-Benz vehicles,” he said. “The Actros particularly shines with its low fuel consumption and handling stability.”

In his speech in Istanbul, Wolf-Dieter Kurz underlined that Mercedes-Benz Türk puts great emphasis on contributing to the business success of customers like Cekok Gida. “We are working hard to meet the different customer demands in a continuously growing and changing market,” he said. “We are closely monitoring market developments so that we can continue to offer state-of-the-art trucks of the highest quality. We are looking forward to continue to work with Cekok Gida.”

Mercedes-Benz Türk

The Daimler subsidiary Mercedes-Benz Türk was established in Istanbul in 1967. It began producing buses for the Turkish market in 1968. The Aksaray plant launched truck production in 1986. The facilities in Aksaray and Hosdere are key elements of Daimler’s global production network.
Credits: Daimler AG

Copyright © 2012, Mercedes-Benz-Blog. All rights reserved.

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Advertorial: Sixt - your top choice for renting a Mercedes-Benz

By | Published Thursday, 19 January 2012

Mercedes-Benz is a wonderful car company and if you want to try out several Mercedes-Benz cars a great was to do so is by renting a car. Sixt is a car rental company from Europe and the number one rent a car company in Germany, which has a large selection of Mercedes-Benz to rent from.


Sixt’s rent a car fleet includes the Mercedes-Benz E, C, and M classes as well as SLK and GLK models. Renting a car is a great way to test out a car to see if you like that car. If you are in the USA than check out a Sixt rent a car in Florida, for you can test drive all of these amazing Mercedes-Benz classes. Or if you want to have a Mercedes-Benz while you are on vacation than Sixt rent a car is a great option because it is in over 100 countries with over 4000 rent a car locations. If you want to test out any of the magnificent Mercedes-Benz cars then it all starts with Sixt rent a car.

Matthew Fransioli
Junior SEO Manager @ Sixt

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A perfect start of the season for AMG Customer Sports: A 1-2-3 for the Mercedes-Benz SLS AMG GT3 in Dubai 24 Hours

By | Published Monday, 16 January 2012

The Mercedes-Benz SLS AMG GT3 scored a commanding 1-2-3 in the Dubai 24-hour race (January 12th till 14th, 2012). The Abu Dhabi Black Falcon team claimed victory with Thomas Jäger (GER), Sean Edwards (ENG), Jeroen Bleekemolen (NED) and Khaled Al Qubaisi (UAE). After setting a new distance record of 628 race laps, final driver Al Qubaisi drove the Gullwing with starting number 3 across the finish line. This first place was also the maiden victory for the Mercedes-Benz SLS AMG GT3 in a 24-hour race.


The first of HEICO Motorsport’s Mercedes-Benz SLS AMG GT3’s came home second, two laps down. Driving duties in the car with starting number 6 were shared by Maximilian Buhk (GER), Christiaan Frankenhout (NED), Max Nilsson (SWE), Andreas Zuber (AUT) and Bernd Schneider (GER). Schneider, the five times’ DTM champion and AMG brand ambassador, drove in both of HEICO Motorsport’s cars as a part of AMG’s Customer Sports driver support programme. In the team’s sister car with starting number 16, he had been entered to partner Kenneth Heyer (GER), Andreas Simonsen (SWE) and Rodolfo Gonzalez (VEN). In a dramatic finish, final driver Simonsen managed to bring a small margin home to round out the clean sweep of the podium by finishing third.

The fourth of the four SLS AMG GT3s that were entered for the race also finished among the front-runners. The Gravity Charouz Racing team with Vincent Radermecker (BEL), Loris de Sordi (BEL), Eric Lux (LUX), Gerard Lopez (ESP) and Tomas Enge (CZE) was classified seventh to complete the good overall performance for the Gullwing cars.

All four Mercedes-Benz SLS AMG GT3s put their mark on the Dubai 24-hour race by showing a commanding performance from the very beginning. In the field of the 72 cars, the Gullwings were among the fastest entries right away. Having started from 15th place on the grid, the Abu Dhabi Black Falcon SLS AMG GT3 moved up into the lead for the first time after two hours. Consistently fast lap times also allowed the other Gullwings to move up quickly into the ranks of the front-runners as well.
During the night, the teams from the AMG Customer Sports programme continued their largely trouble-free run on the 5.39 km long Grand Prix circuit, maintaining their fast lap times and partly alternating in the lead. After one third of the race, the Gullwing with starting number 3 finally took over the lead and held on to it until it crossed the finish line.

Thomas Jäger: “This is an optimal result for the Abu Dhabi Black Falcon team. It shows in an impressive way how performant and reliable the SLS AMG GT3 is. The driver changes went perfectly and, admittedly, we also had the necessary bit of luck: we didn’t get involved in any collisions, which isn’t self-evident with so many cars on such a short track. I want to thank the entire team for a great performance.”

Marc Schramm, managing director Black Falcon: “We came to Dubai to win. That is what we have said prior to the race and we lived up to it thanks to a strong team performance. As usual, the focus of our strategy was on consistency and that worked out in a fantastic way. Of course, I am also happy with having covered a new record distance of 628 laps. Thanks to the entire team and, of course, also to Mercedes-AMG and HWA for the support.”

Bernd Schneider: “During the night, we had a minor problem, that’s why we stood in the pits for a couple of minutes. Had it not been for that, it could even have been slightly better. To be honest, I now feel a little bit knocked out after having raced with both cars, but the success more than makes up for this. After all, finishing second and third at the same time doesn’t happen every day. Congratulations also to the Abu Dhabi Black Falcon team for this well-deserved race win.”

Ola Källenius, chairman of the board, Mercedes-AMG GmbH: “This is a great success! Especially considering that the participation in Dubai was only the fifth 24-hour race for the Mercedes-Benz SLS AMG GT3. Today’s clean sweep of the top three is a great reward for our efforts. I sincerely want to thank our customer teams, drivers and everyone involved. I am looking for a great 2012 motor racing season!”

Most successful newcomer in the 2011 motor sport season

This year's Dubai 24-hour race marks the beginning of the second racing season for the SLS AMG GT3. In its debut year of 2011, the Gullwing became probably the most successful newcomer in the 2011 motorsport season: from March 2011 on 40 race cars were delivered to international customer teams that took part in races on four continents and won a total of 25 races. The success story was crowned by the team title of the FIA GT3 European Championship for HEICO Motorsport and its two Mercedes-Benz SLS AMG GT3 – the first title for the Gullwing in its first full racing season.

The race car: performance and safety

The Mercedes-Benz SLS AMG GT3 is the racing version of the SLS AMG for the customer sport. It is designed for sprint and endurance races and is developed and produced by Mercedes-AMG in close cooperation with HWA AG. HWA is responsible for the development and deployment of the AMG-Mercedes DTM racing team on behalf of and in constant consultation with Mercedes-Benz Motorsport. The near-production SLS AMG GT3 provides not only an athletic performance but an exemplary level of safety that is unmatched by any other current GT3 car.







Credits: Daimler AG

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Mercedes-Benz Classic: New in its full splendour - The oldest SL

By | Published Saturday, 14 January 2012

The roots of the SL-Class lie in motor racing: in the early 1950s, Mercedes-Benz developed the 300 SL, W 194 series racing car. It was a unique blend of three ingredients: lightweight construction, aerodynamics and reliability. The original SL was presented to the stunned press on 12 March 1952 on the motorway between Stuttgart and Heilbronn – a surprise coupe absolutely in line with the later great sports successes of the W 194. Because the 1952 racing season was exceptionally successful for Mercedes-Benz. These were the results reaped by the 300 SL that year: second and fourth places at the Mille Miglia, a triple victory at the Bern Sports Car Grand Prix, a double win at the 24 Hours of Le Mans, a fourfold triumph at the Great Jubilee Prize at Nürburgring and a double victory in the 3rd Carrera Panamericana in Mexico. The brand returned to motor sports – and through the publicity effect, to the international markets – with a great fanfare.


In the Second World War post-era at the beginning of the 1950s, characterised by the reconstruction in Germany, this was a decisively important signal, for great parts of the country still lay in ruins. The production plants and office buildings of the then Daimler-Benz AG were not all fully rebuilt yet, either. However, the incipient “economic miracle”, as the economic revival was to be called, could already be felt. And the Mercedes-Benz 300 SL fitted in perfectly: rising, one could say, like a phoenix from its ashes, it led the way for the brand to return to its erstwhile splendour.

The very looks of the vehicle helped here, for with its slender, elegant matt silver-coloured bodywork and its large Mercedes star in the radiator grille, it embodied high speed even while standing perfectly still. And then there were its gullwing doors, in the case of the very first W 194 series, very short indeed, resembling entry hatches more than actual doors: they lent the racing car a very characteristic aspect – and were instrumental in creating the SL myth. The vehicle with chassis number 2 had these short gullwing doors, making it the oldest SL, and at the same time the only one in existence anywhere in the world today with this particular feature.

Restoration of the 300 SL with chassis number 2

The first 300 SL, the premiere vehicle from 1952, no longer exists; it was property of the factory and was eventually scrapped. However, the second car built, with chassis number 194 010 00002/52 still exists and has remained in the property of the firm ever since it was built in 1951/52. The “/2” embossed on diverse parts bears witness to their genuine nature. This oldest SL in existence was painstakingly restored for the “60 years of the SL” anniversary to be celebrated in 2012. To do this, the Mercedes-Benz Classic Center in Fellbach examined every single part of the entirely disassembled vehicle and wherever necessary reconditioned the component in line with the highest standards of authenticity and quality. The work was based on one clear principle: to preserve substance and patina in every way; at the same time, as far as possible the vehicle was to look as it did in 1952: thus, the second 300 SL (W 194) ever built shines again in new splendour – while displaying the traces of a long and exciting vehicle life with pride.

In the course of the restoration work, first of all, the space frame, the actual backbone of the vehicle, was measured using the most advanced methods. The result: the dimensional deviations were well within the acceptable tolerance range, even after 60 years. This is where the advantages of Number 2’s individual history become evident. Because although the vehicle was used in racing events in 1952, it was never used as a racing car, only as a training and replacement vehicle, for instance in the Bern Sports Car Grand Prix. And this SL was never involved in an accident, either, which also contributed to its overall very good condition today.

A vehicle with character

The W 194 with chassis number “2” is one of two vehicles built that share a special history: number 1 and number 2 were built by hand in Rudolf Uhlenhaut’s Stuttgart-Untertürkheim racing workshop. The following eight vehicles, which were used mainly in the racing events of the year 1952, were manufactured more rationally in the Sindelfingen factory, for instance using pressed parts for the chassis – without using large-series production methods, though.

In those days it was usual to build racing cars more or less as individual items, because each one was designed directly with its specific task in mind. And during the car’s assembly, too, the basic design was modified again and again in order to seek the very best results. This made a unique specimen of each W 194 in a sense – the first two having a much stronger aura of handcrafted one-of-a-kind specimens.

This special character of Number 2 is visible in many of its components: for instance the welding seams show clearly that they were made by hand. Or for example the exhaust system, the fuel tank, the windscreen washer fluid reservoir and the seat frames are all recognisably individually crafted.

Its lightweight design was a great asset for the W 194. This can be seen in its aluminium-magnesium-sheet metal body, which in this vehicle is very thin. It is also evident in the diverse components that are made lighter by means of perforations, for example the front axle, even the handbrake lever. Every gram is skimped on –and that’s why the expensive material magnesium is used, for instance, on the transmission bell, and the rear axle- and steering gear housings. Other components are consistently made from aluminium, for example the fuel tank, the washer fluid reservoir and the main brake cylinder. And the effort is worthwhile: the ready-to-drive W 194 had an unladen weight of just 1060 kilograms.

The sum total of the effort and sums invested show the W 194 to have been a costly project, i.e. a project with prestige character indeed: the company was prepared to invest at that time in order to regain prestige on the international level through the positive publicity effect of the racing successes. And the plan bears fruit, exactly as expected.

Restoring the bodywork

The restoration of the original bodywork was particularly complex and demanding. It was made from very thin aluminium-magnesium sheet metal and was thus by its very nature delicate. In addition, time has left its marks on it in many places, including the marks of earlier partial restoration efforts. In some places the bodywork was very deformed. The experts now went to work with the objective of returning the vehicle to its original aspect of being all “of one piece”. The experts’ work towards the original restored bodywork took around five months, from May to September 2011. The overall character was preserved. Irregularities on the body surface as well as a left-hand-right-hand asymmetry were retained – the original bodywork was hand-made: this is a part of the vehicle history and this is how it is shown again now.

The engine

The W 194’s engine was derived from the power plant of the Mercedes-Benz 300 (W 186) luxury Saloon. For this reason, the engine block of this SL has the number “186” embossed on it, while the modified cylinder head, on the other hand, bears the number “194”: for its use as a racing car, the engineers boosted the engine’s output to around 170 bhp (125 kW), employing among other things three Solex sports carburettors and a sports camshaft. The sports engine was equipped with dry-sump lubrication and installed in a position canted 50 degrees towards the left so as to be able to fit under the very flat bonnet.

Within the framework of the restoration work, the original engine was completely overhauled. On a modern-day test rig it demonstrated its endurance – it ran for around 10 hours, confirming as it did, the original output specifications. The reconditioning of the two electric fuel pumps, for which today no replacement parts exist, was complex. However, the specialists from Mercedes-Benz Classic were also able to recreate these true to the originals.

The engine also shows the character of Number 2: for example the air filter housing is visibly made-to-measure by hand – and between the housing and the closed bonnet there is not even enough space for a person’s hand.

The assembly

The chassis of the W 194 was completed in the course of several months at the Mercedes-Benz Classic Center. Every single component was painstakingly cleaned and examined and, if necessary, reconditioned. The mechanics thus often advanced two steps, only to have to go back one – at times an arduous business. But one that in the end was successful, so that the 1952 racing car was recreated piece by piece anew.

One exceedingly fortunate circumstance was that the vehicle was virtually complete. The large Mercedes star on the radiator, for instance, can be seen to be handmade, as evidenced by the small irregularities it displays. It was polished and reattached, as was the original “300 SL” lettering. The original rear licence plate “W59-4029” still exists, too, while the front number plate was faithfully reproduced. The wooden steering wheel, the gearshift knob, the instruments, the switches: all present and correct. The front axle was reconditioned. It was entirely nickel-plated – a method in use in those days to enable potentially safety-relevant hairline cracks to be easily detected on the racetrack. The rear axle showed, in particular through the state of its mechanical components, that Number 2 had not been subjected to excessive strain, since all the gear wheels were in virtually new condition. The original Alfin brake drums were tested, trimmed and reinstalled; the original riveted wheel rims were clad in Dunlop D8 tyres.

The interior of the W 194 breathes the air of those days. The seat covers, made from the characteristic blue tartan pattern, are new, while the roof lining and the rest of the cover fabric had been preserved in their entirety; they were cleaned and replaced, now gracing the vehicle again. And the aluminium seats under the fabric were also able to be used without excessive work having to be carried out on them. This way the entire interior was recreated – and yet shows the venerable traces of time.

A very special bravura piece was re-creating the body paintwork. The original nitro-lacquer was called “silver bronze”. Today it is no longer available and due to the environmental regulations in force, may no longer be used. Thus, the paint supplier of 1952 now undertook exhaustive research based on contemporary photographic and film material in order to recreate a paint colour as close as possible to the original, producing a precise formula for a water-based paint. With this matt silver paint the W 194 now shines once again as it once did many years ago.

Number 2 was given new window panes. A plexiglas pane is used for the windscreen. The side windows with their air flaps and the rear window are also made from Plexiglas and were provided by the same supplier who made the plastic glazing for this 300 SL in 1952.

Restoration work on the oldest SL in existence took a total of around nine months. But the effort was worth the while: the car is now radiant in all its erstwhile beauty. When the engine of the Mercedes-Benz 300 SL with its original licence plate “W59-4029” is started and the vehicle gets swiftly under way, one can well believe that it is able to reach a top speed of 230 km/h – and take its place among the most successful racing cars of the 1950s.

Mercedes-Benz 300 SL (W 194 series)
Year built: 1952
Number of units: 10
Engine: six-cylinder in-line engine, overhead camshaft, three Solex double carburettors, dry-sump lubrication
Displacement: 2.995 cc
Output: 170 bhp (125 kW) at 5200 rpm
Kerb weight: approx. 1060 kg
Top speed: 230 km/h

Motor sports as initial fuse: the Mercedes-Benz 300 SL racing sports car, W 194 series (1952-1953)

- The first racing car from Mercedes-Benz after the Second World War
- Combination of series-production technology and innovative lightweight design
- Racing as a coupé and as a roadster
- 1953 racing sports car prototype shows elements of the production sports car

Mercedes-Benz 300 SL was the designation of the competition racing car from Mercedes-Benz with which the brand returned to international motor sports for the first time after the Second World War in 1952. Although this car was not sold to the public, it did light the fuse for the development of the later SL-Class from Mercedes-Benz. The development of the 300 SL began in 1950, when Mercedes-Benz began to think about a return to racing. However, the attempt to reactivate the 1939 W 154 Grand Prix racing car met with failure in Argentina in 1951. So engineers pressed forward the development of the new racing car instead. Some of its components came from the Mercedes-Benz 300 luxury saloon (the so-called “Adenauer Mercedes”).

On 15 June 1951, the Board decided to resume participation in racing events from 1952 on, and gave the final orders for the construction of the “300 Super Light”, as the new vehicle was designated. Later on the suffix was abbreviated – giving the combination SL for the model series. Its M 194 engine was derived from the M 186 engine of the Mercedes-Benz 300 type luxury saloon and the elegant two-door 300 S, having an inclined separation plane between cylinder-head and engine block, an overhead camshaft, large intake valves, combustion chamber in engine block and pistons, a displacement of 3 litres and an output of 115 bhp (85 kW). For its use in the racing car the engineers increased the engine’s output to around 170 bhp (125 kW). The sports engine differed from the one installed in the saloon and coupé not only in its output, but also in its installation position, slanted 50 degrees to the left, and in having a dry-sump lubrication system, which due to the absence of the oil sump, enabled a lower installation height.

Weight savings were hardly possible with the engine and the transmission of the W 194 that was being created. And this was also true of the heavy steel axles also taken from the 300 model. There thus remained only the frame and the exterior skin for any possible weight-savings. Another possibility for enhancing competitiveness was to create a body as aerodynamic as possible. Rolf Uhlenhaut, at that time Head of passenger car research at Daimler-Benz, took up his idea of a lightweight tubular frame again, an idea he had entertained some years before. The designers then carried the concept forward to its logical conclusion, creating a lightweight, extremely torsionally rigid frame consisting of very thin highly-alloyed steel tubes assembled to form triangles, whose tubular elements were only subjected to tensional and compressive forces. The entire frame weighed just 50 kilograms and became the backbone of the W 194. The frame of the 300 SL (W 198), the production sports car presented in 1954, was also derived from this frame.

The coachbuilders in Untertürkheim and Sindelfingen spared no effort with the vehicle aluminium body. Thanks to the canted position of the engine and the aerodynamic profile they strove to create, the car was very low, free of trim right down to the underbody, with an elegant low bonnet line, intuitively round-shaped, with recessed headlamps and wheels entirely covered by the bodywork. The classic Mercedes-Benz radiator shape was replaced by a flat racing car front end analogous to that of pre-war cars. The Mercedes star dominated the radiator grille prominently. The passenger compartment was made as narrow as possible, with a strongly raked windscreen, curving round towards the A-pillars. The large rear window flowed over into the aerodynamic rear end. The result was a relatively small frontal area: 1.8 square metres. A drag coefficient was measured on a 1-in-5 scale model and found to be cd = 0.25, a very good value indeed for those days, and that, even without considering the realistic airflow through the engine compartment.

The doors are a chapter all of their own: in order to bestow on a space frame the desired highest-level rigidity, it has to be as wide as possible in the passenger cell sector. This requirement led to the spectacular and later so famous gullwing doors. These doors, deeply incut into the roof, opened upwards and reached only down to the waistline, resembling hatches more than doors. In order to facilitate access over the high side sill, the bodywork designers had even originally intended to have an access step in the lower part of the vehicle body flank; however, this feature was never realized. At the time, the FIA regulations did not specify the type and direction of opening doors. In spite of this, the stewards got very flustered when the vehicle was presented to them for scrutineering before the Mille Miglia in May 1952. In the run-up to the 24 Hours of Le Mans the doors were extended down into the car’s flanks – to forestall any future protests – thereby assuming their final shape. Now they looked even more like outspread wings, for which reason the car was dubbed “gullwing” by the North Americans and “papillon” (butterfly) by the French. In two races, by the way, the 300 SL participated not in the guise of the “gullwing” car, but with a roadster body.

The interior was fully padded and lined, radiating a level of comfort unusual for racing cars. Speedometer and rev counter were located in the optimum position in the driver’s field of vision, below them and in somewhat smaller format were the gauges for water temperature, fuel pressure, oil temperature, and oil pressure. Even a stopwatch was installed. The bucket-type seats with high side sections were covered with tartan-style woollen fabric; the four-spoke steering wheel was removable to facilitate climbing in.

The archetype of the 300 SL, chassis number W 194 010 00001/52, completed its first test drives in November 1951, on the Solitude racetrack on the outskirts of Stuttgart, on the Nürburgring and on the Hockenheimring. The Mercedes-Benz 300 SL racing sport coupé, unusually smooth and, at a height of just 1,225 millimetres, exceptionally low, was presented to the excited and stunned press on the motorway between Stuttgart and Heilbronn on March 12, 1952.

A total of ten W 194 series cars were built for the 1952 season. After the Le Mans race, it was planned to enter the SL in a sports car race on the Nürburgring. In order to make the cars intended for this race as light as possible, they were given a roadster body; a further, narrower car had been set up as a roadster right from the start. To permit the driver easy access, the section of the door extending into the side of the car was retained, and a small windscreen was mounted to deflect air and flying insects. This resulted in a weight advantage of 100 kilograms over the coupé.

The year 1952 was an extremely successful one for the Mercedes-Benz racing department: the results of that year for the 300 SL: second and fourth places in the Mille Miglia; triple victory in the Sports Car Grand Prix of Bern; double victory at the 24 Hours of Le Mans; quadruple victory in the sports car race on the Nürburgring. The last big adventure of the season was participation in the third Carrera Panamericana Mexico, an arduous long-distance race over five days and eight stages, 3,100 kilometres across Mexico. Mercedes-Benz accepted the challenge and entered two coupés and two roadsters in this rally, all powered by engines with an output that had meanwhile been boosted to 180 hp (132 kW). Karl Kling with Hans Klenk and Hermann Lang with Erwin Grupp scored a legendary double victory for Mercedes-Benz in November 1952 in this contest.

The 300 SL was reengineered for the 1953 season. The eleventh SL manufactured received the number W 194/11. Its bodywork was now entirely made from magnesium sheet, even lighter than aluminium. In the wind tunnel it gained – especially in its front section – not only a new face, but also a better airflow through the engine compartment thanks to an optimised shape. The engine output rose, too, among other things thanks to petrol direct injection, which boosted the power of the six-cylinder unit to 215 bhp (158 kW). The rear axle was further developed to a low-pivot single-joint swing axle, while the transmission was flanged on the rear axle following the transaxle principle, which made for a more balanced weight distribution. The wheelbase was shortened by 100 millimetres. The vehicle stood firmly on 16-inch wheels, and the use of disc brakes was considered.

This further-developed 300 SL – in-house affectionately called “carpenter’s plane” on account of its front end – did not actually get to race. However, its bodywork with its angular radiator, compact dimensions and ventilation fins as well as its engine with direct petrol injection already showed the genes that were to make the 300 SL production sports car of 1954 so unique. This production sports car was to become the dream sports car of the 1950s and in 1999 was voted “Sports Car of the Century”.

Production figures for Mercedes-Benz 300 SL (W 194)


















Credits: Daimler AG

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