See also:

General information
WARNING When leaving the vehicle, always remove the SmartKey from the starter switch, take it with you, and lock the vehicle. Do not leave children unattended in the vehicle, or with access ...

Remote vehicle locking
If you forget to lock your vehicle but are no longer in the vicinity of the vehicle, it can be locked for you by the Mercedes-Benz Customer Assistance Center. The vehicle can be locked remotely ...

Switching the screen on/off (Rear Seat Entertainment System only)
If the SmartKey is in the ignition lock in position 0 or 1 or if the SmartKey is not in the ignition lock, the rear screens will switch off after 30 minutes. Before the screens switch off, the ...