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

See also:
Integrated Owner's Manual in the vehicle
The integrated Owner's Manual can be displayed
on the Control Display. The equipment
and functions that are in the vehicle are described
therein. ...
Visual warning
The approach of the vehicle to an object can be
shown on the Control Display.
When the distance to an object is small, a red bar
is shown in front of the vehicle, as it is in the PDC
display.
...
Adjusting manually
Forward/backward
Forward/backward
Pull the lever and slide the seat into the desired
position. After releasing the lever, move the seat
forward or back slightly to make sure it engages
prope ...
