ACC uses a radar sensor to check for moving objects ahead in the same traffic lane. ACC will maintain a set constant vehicle speed as long as no other traffic is detected. If a preceding slower vehicle is detected, ACC will reduce the engine power and - if necessary - apply retarder systems and brakes to maintain a set safe following distance.
A distance alert will be given if intervention by the driver is required to maintain the set distance. The build-in Forward Collision Warning function alerts the driver to apply the maximum braking force in order to avoid a rear-end collision. ACC reliefs the driver from continual readjustments of the set cruise speed and thus reduces strain and fatigue. ACC makes driving more relaxed and safer.
Click on Play to view the ACC animation:
(You need Windows Mediaplayer to view this animation)