General information

If you cannot lock or unlock the vehicle with the SmartKey, either the battery in the SmartKey is discharged, the SmartKey is faulty or the starter battery is discharged.

Check the battery in the SmartKey and replace it if necessary.
Unlock the driver's door using the mechanical key.
Lock the vehicle.
Have the starter battery and battery contacts checked at an authorized Mercedes-Benz Center.

If the SmartKey is faulty, contact Roadside Assistance or an authorized Mercedes-Benz Center.

    See also:

    Setting the air distribution
    You can set the air distribution separately for the driver’s and front-passenger side. Select left air distribution 2 or right air distribution 6 by turning the COMAND controller and press t ...

    Seat belt
    Display messages Possible causes/consequences and Solutions After starting the engine, the red seat belt warning lamp lights up for six seconds. The seat belt warning lam ...

    Cleaning the display
    Before cleaning the display, make sure that it is switched off and has cooled down. Clean the display surface using a commercially-available microfiber cloth and TFT/LCD display cleaner. Dr ...