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

See also:
Programs
The system offers two different programs.
The programs can be selected via Dynamic Driving
Control.
SPORT
Consistently sporty tuning of the Integral Active
Steering for greater driving agility ...
Safety switch for the rear
Press the button on the driver's door if
children are being transported in the
rear.
This locks various functions so that they cannot
be operated from the rear: safety switch. ...
Summer tires
Do not drive with a tire tread depth of less than
0.12 in/3 mm.
There is an increased danger of hydroplaning if
the tread depth is less than 0.12 in/3 mm. ...
