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:

    Opening
    Press the button on the SmartKey. Pull handle 1. Raise the tailgate. Vehicles with the EASY-PACK tailgate: if you pull handle 1 and keep it in this position, you can open the tailga ...

    Drive sensibly – save fuel
    Observe the following tips to save fuel: – The tires should always be inflated to the recommended tire pressure. – Remove unnecessary loads. – Remove roof carriers when they are not needed. – Warm ...

    Important safety notes
    Have the batteries changed at a qualified specialist workshop. WARNING Batteries contain toxic substances. Swallowing batteries can lead to serious health issues or death. Keep batteries out ...