See also:

Trailer towing
PARKTRONIC is deactivated for the rear area when you establish an electrical connection between your vehicle and a trailer. Fold in the ball coupling if the trailer tow hitch is not required. ...

Locking the vehicle
If the vehicle can no longer be locked with the SmartKey, you can lock it by taking the following steps. If the central locking in the vehicle is malfunctioning, you cannot lock the trunk. P ...

Automatic headlamp mode
X To switch on automatic headlamp mode: turn the light switch to or . SmartKey in position 1 in the ignition lock: the parking lamps are switched on or off automatically depending on the brightn ...