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

See also:
Reverse gear
Select only when the vehicle is stationary. When
the gearshift lever is pressed to the left, a slight
resistance needs to be overcome. ...
Buckling the belt
Make sure you hear the latch plate engage in the
belt buckle. ...
On the front passenger seat
Deactivating airbags
After installing a child restraint fixing system in
the front passenger seat, make sure that the
front, knee and side airbags on the front passenger
side are deactivated.
...
