Mercedes Benz

The all-encompassing approach taken to achieving a high standard of safety evinces itself particularly clearly in the Integral Safety concept, that Mercedes-Benz has once again implemented in the new GLK. This groundbreaking safety philosophy goes far beyond just compliance with crash test specifications. Instead, it concerns itself with all aspects of motoring – everything that is of relevance for the safety of both the vehicle's occupants and other road users. The Mercedes safety concept divides these different aspects into four phases:

1. Safe driving:
avoiding danger, warning and rapid assistance

2. When danger threatens:
acting in an anticipatory manner with PRE-SAFE®

3. During an accident:
protecting as required

4. Following an accident:
damage limitation, rapid assistance

In combination with the front and rear deformation zones, the high-strength passenger cell of the GLK-Class provides a highly efficient foundation for the occupant protection systems. The intricate restraint system is capable of offering the greatest possible protection potential. As many as nine airbags are fitted, which are deployed selectively depending on the type of collision and its severity to reduce the forces exerted on the occupants. The individual components include:

In the GLK, the task of deploying the driver and front-passenger airbags, kneebag, sidebags, windowbags, belt tensioners and NECK-PRO crash-responsive head restraints in line with the type of collision and its severity is handled by the central control unit, dubbed ARAMIS. This electronic safety "command centre" is able to detect the impact type and severity in a matter of milliseconds, then trigger the restraint systems as required on the basis of the calculated prognosis of the impact's severity. The ARAMIS control unit gleans the necessary information from an elaborate network of sensors, including two up-front sensors on the flexible bumper bracket at the front, two lateral satellite sensors near the base of the B‑pillars, as well as supplementary pressure sensors in the doors. In addition to this, ARAMIS can activate individual functions which are able to defuse an accident situation following the actual impact: certain portions of the vehicle's electrical network can be isolated from the battery, the engine shut off, the hazard warning lights and crash-responsive emergency lighting switched on, the doors unlocked, and the side windows lowered by 50 mm.

The excellent protective abilities of all GLK models are underpinned by a unitised sheet-steel body featuring a high-strength passenger cell together with front and rear-end structures that fulfil a deforming function in the event of a crash, enabling as much of the impact energy as possible to be absorbed

The following measures have been implemented at the front end of the body to ensure outstanding energy absorption. In all, the individual assemblies and components involved form three separate paths for absorbing and channelling the energy released by the impact:

The passenger cell forms the hard core of passive safety, enveloping the vehicle's occupants in a high-strength safety cage. This exceptional degree of stability is attained as follows:

There are amply proportioned deformation paths for absorbing impact energy at the rear end of the body. The rear longitudinal members are made from high-strength steel in the critical crumple zones. The fuel tank is in a well-protected location, underneath the rear bench seat and in front of the rear axle.

During the development phase of the GLK, particularly close attention was paid to pedestrian protection. This is why standard equipment for all GLK models includes Brake Assist (BAS), which shortens the braking distance significantly when an emergency braking situation is detected, so as to help prevent accidents or at the very least mitigate their consequences. Secondly, the front section incorporates precisely defined clearances between the body and the major assemblies beneath, allowing the bonnet to yield considerably if hit by a pedestrian. This combines with the specially shaped design of the front bumpers and the softer foam used for their integral impact dampers to unlock further potential for protecting pedestrians.

World premiere: PRE-SAFE® makes its debut in a compact SUV

The optionally available PRE-SAFE® anticipatory occupant protection system, being made available in the compact-SUV market segment for the very first time, sees Mercedes-Benz taking safety in this segment to an unprecedentedly high level. The highlight of this safety concept, that has been the subject of ongoing development since it was first launched in 2002, is the networking between the active and passive safety systems. By using the information received from the sensors of the dynamic handling control systems – for example, BAS and ESP® – PRE-SAFE® is able to detect critical driving situations where there is a heightened risk of an accident occurring and take precautionary measures to protect the occupants.

PRE-SAFE® basically springs into action when one of the following criteria is met:

When a potential accident situation is detected, the system primes both the occupants and the vehicle for a possible impact. To this end, the seat belts for the driver and front passenger can be pulled taut if necessary. The optionally available power adjustable front passenger seat with memory function can be brought into a more favourable position that maximises the protective capabilities of the airbags and seat belt system. The system also takes the precaution of closing the panoramic glass sliding sunroof and side windows if a critical driving state affecting the vehicle's lateral dynamics arises. This optimises the protective effect of the windowbags on the one hand, whilst also better preventing foreign objects from penetrating the interior or parts of the body from dangling dangerously outside.

If a collision is averted and a stable driving state restored, the seat belts will slacken again. All other systems that have been triggered – such as the repositioned front passenger sear, side windows and sliding sunroof – can be returned to their original position.

Whereas the passive safety systems enable a high degree of occupant protection during and following an accident, the active safety features are designed to take action beforehand. The high standard of active safety in the GLK-Class is rooted in the AGILITY CONTROL suspension with selective damping system, which blends stable handling with comfort. The electrohydraulic AGILITY CONTROL steering that comes as standard keeps the driver perfectly informed of the current state of the road, whilst responding with utmost precision to steering inputs. The V6 models – the GLK 320 CDI 4MATIC, GLK 350 4MATIC and GLK 280 4MATIC – benefit from speed-sensitive power steering as standard for even greater operating convenience.

The sophisticated 4MATIC all-wheel drive system, with its stable, safety-enhancing basic set-up, as well as the standard dynamic handling control systems – ESP®, 4ETS and ASR – come to the driver's aid in critical driving situations. The same is true of the ADAPTIVE BRAKE system, featuring built-in functions such as hill-start assist, priming of the brake system for more spontaneous response in the event of panic braking and braking the brake discs dry in the wet. The tyre pressure loss warning system forms part of the basic specification too, as does the ESP® trailer

stabilisation function. There is also the option of the tyre pressure monitoring system, which monitors the individual tyre pressures and notifies the driver of exactly which tyre is not inflated to the correct pressure.

A high level of driver-fitness safety is an intrinsic component of any passenger car model from Mercedes-Benz. Relaxed, fatigue-free driving, even over long distances, is helped by the sense of wellbeing aboard the vehicle that Mercedes is renowned for. This is down to aspects such as the outstanding seat and ride comfort, a pleasant level of background noise and ergonomic controls, along with a climate control system that can be sensitively adjusted to suit requirements. The tinted glass all round and the optional LINGUATRONIC voice-operated control system make travelling in the GLK a true pleasure. Driver-fitness safety also benefits from the wonderfully assured handling, as well as the cruise control with its integral SPEEDTRONIC variable speed limiter.

Features which contribute to the outstanding perceptive safety include the superb all-round view, the extensive swept area of the front windscreen, as well as the generously sized, heated and electrically adjustable exterior mirrors. Perceptive safety is given a further boost by the powerful H7 headlamp system with integrated cornering light function and Headlamp Assist. For even greater visibility at night, there is the option of the Intelligent Light System (ILS) with bi-xenon headlamps. Also helping to prevent accidents are the standard-specification adaptive brake lights, which flash when the brakes are applied in an emergency as a warning to road users behind and thereby serve to heighten safety in general in critical driving situations. The driver's perception of the vehicle's surroundings can be further enhanced by the addition of equipment features such as the rain sensor with two different sensitivities that can be set using the control stalk, the PARKTRONIC manoeuvring aid or the reversing camera.