Locking the vehicle (mechanical key)

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

  • Open the driver's door.
  • Close the front-passenger door, the rear doors and the tailgate.
  • Press the locking button ().
  • 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.
  • Close the driver's door.
  • Take the mechanical key out of the SmartKey ().
  • 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 back and remove it.
  • Make sure that the doors and the tailgate are locked.
  • Insert the mechanical key into the SmartKey.

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

    See also:

    Important safety notes
    WARNING Only use fuses that have been approved for Mercedes-Benz vehicles and that have the correct fuse rating for the systems concerned. Do not attempt to repair or bridge faulty fuses. Us ...

    Locking and unlocking centrally
    The SmartKey centrally locks/unlocks: - the doors - the trunk lid/tailgate - the fuel filler flap When unlocking, the turn signals flash once. When locking, they flash three times When ...

    MB Info call button
    ► Open the stowage compartment under the armrest. ► Press and hold MB Info call button 1 for more than two seconds. This initiates a call to the Mercedes-Benz Customer Assistanc ...