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:

    Accepting a call
    If someone calls you when you are in the Telephone menu, a display message appears in the multifunction display, for example: ► Press the button on the steering wheel to accept an incomi ...

    Driving tips
    Kickdown Use kickdown for maximum acceleration. ► Vehicles for USA: fully depress the accelerator pedal. The transmission shifts to a lower gear depending on the engine speed. ► ...

    Setting the footwell temperature
    The footwell temperature can be set via COMAND. ...