Warning from driver support in the event of a collision risk

The driver support systems of adaptive cruise control* and Pilot Assist* can warn the driver if the distance to the vehicle ahead suddenly becomes too short.
P5-1617-v54x - City Safety, audio-visual warning and radar sensor
Audio and symbol for collision warning.
  1. P5-Icon red circle 1Acoustic warning signal in the event of a risk of collision
  2. P5-Icon red circle 2Warning signal in the event of a risk of collision
  3. P5-Icon red circle 3Distance measurement with the camera and radar unit

Adaptive cruise control and Pilot Assist use approx. 40% of the capacity of the foot brake. If the car needs to be braked more heavily than the driver support is capable of and the driver does not brake, the warning lamp and acoustic warning are activated to alert the driver that immediate intervention is required.


The driver support systems only warn of vehicles which their radar unit has detected – hence a warning may not be given, or it may be given with a certain delay. Never wait for a warning. Apply the brakes when the situation requires.
P5-1507-Head Up Display, collision warning
Symbol for collision warning on the windscreen.

In cars equipped with a head up display*, the warning is shown on the windscreen by a flashing symbol.


Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight ahead may make the visual warning signal in the windscreen difficult to recognise.
  1. * Option/accessory.