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

See also:
Using the door lock
General information
Do not lock from the outside
Do not lock the vehicle from the outside if
there are people in it, as the vehicle cannot be
unlocked from inside without special knowledge.
...
Long-term vehicle storage
Your service center can advise you on what to
consider when storing the vehicle for longer
than three months. ...
Important features in the engine compartment
1 Washer fluid reservoir
2 Vehicle identification number
3 Jump-starting, negative terminal
4 Jump-starting, positive terminal
5 Coolant reservoir
6 Oil filler neck ...
