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:

    Recovering a vehicle that has become stuck
    Pull away smoothly, slowly, and in a straight line when pulling out a vehicle that has become stuck. Excessive tractive power could damage the vehicles. If the drive wheels have become stuck in ...

    Important safety notes
    WARNING Do not adjust the steering wheel while driving. Adjusting the steering wheel while driving could cause the driver to lose control of the vehicle. The electrical steering wheel adj ...

    Replacing the windshield wiper blades
    Removing the wiper blades •► Remove the SmartKey from the ignition lock or turn it to position 0 (KEYLESS-GO). •► Fold the wiper arm away from the windshield until it engages. •` ...