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:

    Opening
    You can open the trunk lid automatically using the SmartKey or the handle in the trunk lid. Press and hold the button on the SmartKey until the trunk lid opens. or When the trunk is unloc ...

    Stop function
    Press the COMAND controller to show the menu. To interrupt playback: select by turning the COMAND controller and press to confirm. The display changes to . The video image is hidd ...

    Switching Adaptive Highbeam Assist on/off
    Press the or button on the steering wheel to select the Settings menu. Press the or button to select Adapt. High-beam Asst.. Press the button to confirm. To activate/deactivate: p ...