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

See also:
Controls
The audio and video sources can be controlled using the:
> Buttons near the CD/DVD player
> iDrive
> Buttons on the steering wheel,
> Programmable memory keys,
> Voice activation s ...
Audio playback
Selecting the track using the button
Press the button repeatedly
until the
desired track is played.
Selecting the track using the iDrive
Audio CDs
Select the desired track to begin playback. ...
Indicator/warning lamps
The indicator lamp flashes: DSC controls
the drive forces and brake forces.
The indicator lamp lights up: DSC has
failed. ...
