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.

SmartKey and 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.
mechanical key. Lock the vehicle using the mechanical key.
battery contacts checked at a qualified specialist workshop. 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:

    Parking
    WARNING PARKTRONIC and Active Parking Assist are merely parking aids and may not detect all obstacles. They do not relieve you of the responsibility of paying attention. You are always respon ...

    Towing the vehicle with the rear axle raised
    Only possible on vehicles without 4MATIC. When towing your vehicle with the rear axle raised, it is important that you observe the safety instructions. The ignition must be switched off if ...

    PSI (pounds per square inch)
    A standard unit of measure for tire pressure. ...