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

See also:
Knob in the instrument cluster
Press the knob.
▷ When the ignition is switched on, the trip
odometer is reset.
Press the knob for approx. 5 seconds:
View service requirement display
▷ When the ignition is switched ...
Display
Information stage
The dimmed lamp in the mirror housing indicates
when there are vehicles in the blind spot
or approaching from behind.
Warning
If the turn signal is set while a vehicle is in ...
Switching on/off manually
Switching on/off manually
Press the button.
▷ On: the LED lights up.
▷ Off: the LED goes out.
If PDC is displayed, switch on the backup camera
via the iDrive ...
