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:

    Displays and controls
      ...

    Setting the specified minimum distance
    You can set the specified minimum distance for DISTRONIC by varying the time span between one and two seconds. This time span determines the distance that DISTRONIC should maintain from the vehicl ...

    Setting the air distribution
    Air distribution settings Directs air through the center and side air vents Directs the airflow through the footwell air vents Directs air through the center, side and footwell vents Dir ...