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:

    Opening and closing
    Overhead control panel 1 To raise 2 To open 3 To close/lower The panorama roof with power tilt/sliding panel can only be operated when the roller sunblind is open. - Turn the SmartKey to ...

    Cruise control lever
    1. To store the current speed or a higher speed 2. To store the current speed or a lower speed 3. To deactivate DISTRONIC PLUS 4. To store the current speed or to call up the last ...

    Setting the side air vents
    •► To open/close: turn thumbwheel 3 up or down. Side window defroster vent 1 is never completely shut, even if side air vent 2 is shut. ...