Mercedes Benz

OFFICIAL PRESS RELEASE

Stuttgart, Germany, Oct 12, 2009

Engines: Lower displacement, higher output and efficiency

- A range of ten engines from 136 to 525 hp
- Diesel- and petrol engines featuring a variety of innovations
- All engines comply with more stringent EU5 emissions standard

"More power and more driving pleasure with even lower fuel consumption" - this is the motto for the engine range of the new Estate. The new and more advanced engines provide more power with lower displacements than previous engines and impress with consumption figures which previously were only heard of in the compant car class.


The new four-cylinder diesel engine in the E 250 CDIBlueEFFICIENCY for example is proof that the plans have worked out successfully: with an output of 150 kW/204 hp,
a peak torque of 500 Nm and a displacement of 2.2 litres, it develops around seven percent more power and delivers 25 percent more torque than the previous V6 diesel engine with a displacement of three litres in the E 280 CDI, whilst consuming around 21 percent less fuel. Consuming 5.7 litres per 100 kilometres (NEDC combined figure), it is significantly more economical than comparable estates in this category.

The CO2 emissions figure for the new four-cylinder diesel models is 150 grams per kilometre - up to 21 percent lower than the figures achieved by the previous CDImodels. As with carbon dioxide emissions, the engines for the new E-Class have also taken a further major step towards the future when it comes to exhaust gas emissions: all of the powerplants meet the requirements of the EU 5 standard, whose limits are up to 80 percent more stringent than those in previous standards.

Diesel engines: new four-cylinder, optimised six-cylinder

At the time of market launch of the Estate, the newly developed CDI four-cylinderis available in two versions with different outputs: 125 kW/170 hp and also 150 kW/ 204 hp. Their respective fuel consumption and CO2 emission figures are 5.7 litres per 100 kilometres and 150 grams per kilometre (combined consumption in NEDC cycle). In the first quarter of 2010, the E 200 CDIproducing 100 kW/136 hp will become available.

The new engines are both powerful and responsive. They feature high pulling power and display an exemplary smoothness of operation which is impressive for a four-cylinder engine. Furthermore, their exceptional responsiveness is reflected in the
performance figures: the E 250 CDIBlueEFFICIENCY takes 7.8 seconds to accelerate from 0 to 100 km/h. The E 220 CDIBlueEFFICIENCY, which produces 125 kW/170 hp, can top the 100 km/h mark from a standing start in 8.8 seconds.

This series of four-cylinder engines sees Mercedes-Benz introducing fourth-generation common-rail direct injection into series production. One of its hallmarks is a 400-bar increase in the maximum rail pressure to 2000 bar, newly developed piezo injectors, and also the debut of two-stage turbocharging in a standard-production diesel engine for passenger cars at Mercedes-Benz. The compact module for the new two-stage turbocharger consists of a small high-pressure (HP) turbocharger and a large low-pressure (LP) turbocharger. These are connected in series, and each has a turbine and a compressor driven by this turbine. This means that the optimum charge pressure can be built up at low engine revs.

The V6 diesel engine for the new E-Class is also one of the most sophisticated compression-ignition units on the world market. It offers substantially greater output, comfort and driving enjoyment than other engines thanks to the immense torque of 540 Nm alone, which is available between 1600 and 2400 rpm, enabling outstanding agility when accelerating from rest and exemplary flexibility when accelerating in any gear. The E 350 CDIBlueEFFICIENCY (170 kW/231 hp) accelerates from 0 to 100 km/h in 7.2 seconds.

Despite the higher output, fuel consumption has been reduced to 7.0 to 7.3 litres per 100 kilometres (NEDC combined figure), equivalent to 185 - 192 grams of CO2
per kilometre. The 7G-TRONIC seven-speed automatic transmission is specified as standard for the E 350 CDIBlueEFFICIENCY model.

The Mercedes engineers have gone to great lengths to optimise the technology at the heart of the V6 diesel engine, reducing the compression from 17.7 to 15.5 and enhancing the turbocharger with a more efficient EGRcooling zone, switchable bypass duct, ceramic glow system, modified injection nozzles and optimised air ducting.

Petrol engines: CGI engines and optimised eight-cylinder

CGI appears at the end of the model designation of the four- and six-cylinder engines for the new E-Class, signifying that Mercedes-Benz uses direct petrol injection for these powerplants - a technology which allows further advances when it comes to reducing petrol consumption.

Compared to conventional port injection, direct fuel injection allows higher compression and, therefore, improved thermodynamic efficiency, saving motorists money at the pump: the new four-cylinder direct-injection powerplants for the E-Class consume up to 18 percent less fuel than the comparable engines installed in the previous model. In the E 250 CGIBlueEFFICIENCY model (150 kW/ 204 hp), Mercedes-Benz has replaced the previous V6 2.5-litre engine with a four-cylinder 1.8-litre unit yet still manages to increase torque by over 26 percent. This result reveals a further Mercedes strategy for the future: the use of turbochargers in small-displacement engines.Mercedes-Benz equips the E 250 CGIBlueEFFICIENCY model with a five-speed automatic transmission, while the E 200 CGIBlueEFFICIENCY model features a six-speed manual transmission and the ECO start/stop function, which shuts off the engine automatically when it is idling, thus making a significant contribution towards saving fuel.

The E 350 CGI BlueEFFICIENCY model is equipped with the world's first petrol engine to feature spray-guided combustion. The six-cylinder powerplant develops
215 kW/292 hp and provides a peak torque of 365 Nm from 3000 rpm. The key benefit of the six-cylinder engine is delivered in stratified-charge mode, when the powerplant operates with a high degree of excess air and, therefore, extremely fuel-efficiently. Thanks to the state-of-the-art engine technology, fuel consumption is
reduced to between 8.6 and 8.9 litres per 100 kilometres (NEDC combined figure), which is up to one litre per 100 kilometres less than the figure achieved by the predecessor. What's more, the highly economical and environmentally compatible CGIpowerplant provides a unique driving experience: it takes the E 350 CGIBlueEFFICIENCY model just 7.0 seconds to accelerate from 0 to 100 km/h. The
E 350 4MATIC is available in a version producing kW/272 hp, in combination with all-wheel drive. Its V6 engine features port injection.

The eight-cylinder unit in the E 500 model - the flagship powerplant in the new generation of Mercedes-Benz V engines - incorporates an extensive technology package to create a blend of high output and torque yield with exemplary refinement and effortlessly superior agility. The extent of the powerplant's capability is highlighted by the performance figures for the new top-of-the-range E-Class model, which is equipped with the 7G-TRONIC 7-speed automatic transmission as standard:
0 to 100 km/h in 5.4 seconds.

Mercedes engineers use an intelligent valve-timing concept, achieving a level of progress that is a major factor behind the excellent torque and output characteristics. An optimum supply of fresh mixture for the cylinders is assured thanks to four-valve technology and, above all, continuously variable and continuous intake and exhaust camshaft adjustment. The valves are always opened at precisely the right moment in any driving situation, significantly improving the gas cycle in the combustion chambers and reducing energy losses.