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

See also:
Audio/video playback
Audio
Audio can be played back via rear entertainment
from any source in the vehicle.
Operation is the same as for the front audio playback.
Video
Video can be played back in the rear from the
...
Buttons at a glance
Buttons at a glance
1 System on/off, interrupt
2 Resume speed
3 Store speed
4 Reduce distance
5 Store, maintain/change speed
6 Increase distance ...
Indicator/warning lamps
The indicator lamp flashes: DSC controls
the drive forces and brake forces.
The indicator lamp lights up: DSC has
failed. ...
