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:

    Folding the exterior mirrors in or out automatically
    When the "Automatic mirror folding" function is activated in COMAND: • the exterior mirrors fold in automatically as soon as you lock the vehicle from the outside. • the exterior ...

    Problems with PARKTRONIC
    Problem Possible causes/consequences and - Solutions Only the red segments in the PARKTRONIC warning displays are lit. You also hear a warning tone for approximately ...

    Useful information
    This Operator's Manual describes all models and all standard and optional equipment of your vehicle available at the time of publication of the Operator's Manual. Country-specific differences ...