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Drive-Off Assistant Not Working
If the Drive-Off Assistant is not functioning, the driver cannot be assisted when driving off on hills.
If the vehicle comes to a standstill on a steep uphill gradient without operation of the footbrake by the driver, this may result in a certain roll-back before the vehicle is held by the HOLD function. In this situation, the driver can reduce the roll-back by pressing the footbrake.
Brake pedal feels different. When Adaptive Cruise Control is operating normally or when the HOLD function is active, the brake pedal may feel different and you may hear hydraulic noises.
Pressing the footbrake while the HOLD function is active can cause pulsations in the pedal. This behavior is normal for the system. It is not a fault..
ABS Brake System (Anti-Lock Brake System)
Loss of Control Over The Vehicle
Despite of the advantages of ABS, it is still the driver’s responsibility to adapt his driving style and maneuvers in line with road and weather conditions, as well as the traffic situation.
The increased safety that is provided should not induce you to take greater risks with your safety. The limits set by the physics of driving cannot be overcome, even with ABS.
Risk of accidents due to inappropriate speed cannot be reduced by ABS.
The decisive advantage of ABS lies in the driving stability and maneuverability of the vehicle in hazardous situations.
ABS prevents locking of the wheels during full braking, on almost all road surfaces, until just before the vehicle stops.
ABS begins to control the braking process as soon as a wheel shows a tendency to lock. This controlled braking process is comparable with extremely rapid cadence braking.
The pulsating brake pedal and a “juddering noise” warn the driver to adapt his driving speed to the road conditions.
ABS warning light USA
ABS warning light Canada
If the ABS warning light lights up on the instrument panel while the engine is running, the ABS has switched off because of a fault.
The yellow warning message “ABS/PSM loss Possible to drive on” appears on the multi-function display of the instrument panel.
For information on warning messages on the multi-function display:
In this case, the brake system will operate without lock prevention, as on vehicles without ABS.
The ABS control unit is adjusted for the approved tire dimensions.
The use of tires with non-approved dimensions can lead to different wheel speeds, causing ABS to switch off.