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

See also:
Rear doors
Rear doors
Push the locking lever on the rear doors down.
The door can now be opened from the outside
only. ...
Resetting the tone settings
1. "CD/Multimedia", "Radio" or "Settings"
2. "Tone"
3. "Reset" ...
Calling up settings
Do not retrieve the memory while driving
Do not retrieve the memory setting while
driving, as an unexpected movement of the seat
or steering wheel could result in an accident.
Comfort function
...
