General notes

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.

replace it if necessary. Check the battery in the SmartKey and replace it if necessary.
mechanical key. Unlock the driver's door using the mechanical key.
Lock the vehicle.
contacts checked at a qualified specialist Have the starter battery and the battery contacts checked at a qualified specialist workshop.

If the SmartKey is faulty, contact Roadside Assistance or a qualified specialist workshop.

    See also:

    General information
    Automatic picture shutoff If the vehicle is traveling faster than approximately 3 mph (5 km/h) and video DVD mode is activated, the picture is deactivated automatically. The video picture is o ...

    INTERIOR
    It's inside the R-Class where some of those previously mentioned quirks start rearing their ugly heads. The R-Class has an electronic gearshift lever on the steering wheel. Putting the car into ...

    Using the SmartKey
    The SmartKey must be close to the driver's door handle. •► Point the tip of the SmartKey at the driver's door handle. •► Press and hold the button until the side windows and the ...