Locking the vehicle (mechanical key)

If the vehicle can no longer be locked with the SmartKey, use the mechanical key.

Close the front-passenger door, the Open the driver's door.
rear doors and the trunk lid. Close the front-passenger door, the rear doors and the trunk lid.
Check whether the locking knobs on Press the locking button.
the front-passenger door and the rear doors are still visible. Press down the Check whether the locking knobs on the front-passenger door and the rear doors are still visible. Press down the locking knobs by hand, if necessary.
Take the mechanical key out of the Close the driver's door.
SmartKey. Take the mechanical key out of the SmartKey.
lock of the driver's door as far as it will go. Insert the mechanical key into the lock of the driver's door as far as it will go.

Turn the mechanical key

clockwise as far as it will go to position 1. Turn the mechanical key clockwise as far as it will go to position 1.
remove it. Turn the mechanical key back and remove it.
trunk lid are locked. Make sure that the doors and the trunk lid are locked.
SmartKey. Insert the mechanical key into the SmartKey.

described above, If you lock the vehicle as described above, the fuel filler flap is not locked. The antitheft alarm system is not armed.

    See also:

    Problems with the seat heating
    The seat heating has switched off prematurely or cannot be switched on. The vehicle's electrical system voltage is too low because too many electrical consumers are switched on. Switch off e ...

    System self-test
    The indicator lamp illuminates when you: • turn the SmartKey to position 1 or 2 in the ignition lock • press the KEYLESS-GO Start/Stop button once or twice If an adult occupant is properly s ...

    Qualified specialist workshop
    An authorized Mercedes-Benz Center is a qualified specialist workshop. It has the necessary specialist knowledge, tools and qualifications to correctly carry out the work required on your vehi ...