Adaptive cruise control

Speed is often underestimated and the distance to the vehicle in front easily overestimated. The ACC system is able to automatically adjust the driving speed as well as the distance to the vehicle ahead in accordance with the pre-settings. It can be used from a speed of 25 km/h onwards. Its main field of application, however, is in driving on main roads and motorways.

Function and operation

The ACC radar sensor with a range of approx. 150 m recognises the distance to and the relative speed of the vehicles in front in the same lane. The ACC control unit calculates the best approach strategy from the sensor data, the course of the lane, the speed of its own vehicle and the actions of the driver and triggers the engine torque and brake management system (retarder and service brake) accordingly. The road speed, acceleration and retardation of the vehicle are actively regulated and the distance to the vehicle ahead is maintained. ACC is operated as before from the cruise control lever.

It is also possible to set the target distance according to the driver's wishes. The pre-set value is the 50 m stipulated by law in Germany.

The driver retains full responsibility for his vehicle and can override the ACC system at any time with the accelerator pedal. If he actuates the brake pedal / retarder lever, the system is switched off.