See also:

Vehicle remote opening
If you have unintentionally locked your vehicle (e.g. the SmartKey is still in the vehicle) and a replacement SmartKey is not available, the vehicle can be opened by a Mercedes-Benz Customer A ...

SmartKey
Display messages Key Does Not Belong to Vehicle Possible causes/consequences and ► Solutions You have put the wrong SmartKey in the ignition lock. ► Use the correct SmartKey. Disp ...

Locking the trunk separately
You can lock the trunk separately. If you then unlock the vehicle centrally, the trunk remains locked and cannot be opened. Close the trunk lid. Take the mechanical key out of the SmartKey ...