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:

    Cabin Comfort
    It's hard to believe the cabin design in the S-Class is four years old. It feels contemporary, from its broad instrument shelf, which ps two-thirds of the dashboard, to the seamless row of climate ...

    Switching wavebands
    Select FM, AM or WB in the radio display by sliding and turning the COMAND controller and press to confirm. Waveband submenu is opened. 1 The waveband submenu (the dot shows the waveba ...

    Extending/retracting the rear window blind
    Make sure that the rear window blind can move freely. Otherwise, the blind or other objects could be damaged. The rear window blind is deactivated at temperatures below -20 °C. To extend/ ...