General information

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.

► Check the battery in the SmartKey and replace it if necessary.
► Unlock the driver's door using the mechanical key.
► Lock the vehicle.
► Have the starter battery and battery contacts checked at an authorized Mercedes-Benz Center.

If the SmartKey is faulty, contact Roadside Assistance or an authorized Mercedes-Benz Center.

    See also:

    Switching off the engine
    Important safety notes WARNING   Do not turn off the engine before the vehicle has come to a complete stop. With the engine not running, there is no power assistance for the brake and s ...

    Removing the mechanical key
    Removing the mechanical key Push release catch 1 in the direction of the arrow and at the same time, remove mechanical key 2 from the SmartKey. ...

    Changing the picture format
    Select Source in the AUX menu and press the button on the remote control to confirm. Select Display Aux or Disk Drive Aux and press the button to confirm. Select Auto16:9 optimized, 4:3 o ...