The concept
The parking brake is primarily intended to prevent the vehicle from rolling while parked; it brakes the rear wheels.

See also:
Indicator/warning lamps
The indicator lamp flashes: DSC controls
the drive forces and brake forces.
The indicator lamp lights up: DSC has
failed. ...
System limits
Top View cannot be used in the following situations:
▷ With a door open.
▷ With the trunk lid open.
▷ With an exterior mirror folded in.
▷ In poor light.
A Check Control m ...
Radar sensor
Position
Radar sensor
Dirty or covered sensor
A dirty or covered sensor may hinder the detection
of vehicles.
If necessary, clean the radar sensor. Remove
layers of snow and ice carefull ...
