See also:

Vehicle equipment
All standard, country-specific and optional equipment that is offered in the model series is described in this chapter. Therefore, equipment is also described that is not available in a vehicle, ...

Malfunction
In the event of a failure or malfunction of the parking brake, secure the vehicle against rolling using a wheel chock, for example, when leaving it. ...

Locking
▷ Press the button. The doors are locked. ▷ Press the lock button of a door. To prevent you from being locked out, the opened driver's door cannot be locked using the lock button. ...