General notes

If you use the mechanical key to unlock and open the driver's door or the trunk lid, the anti-theft alarm system will be triggered.

There are several ways to turn off the alarm:
SmartKey: press the  or To turn the alarm off with the SmartKey: press the button or on the SmartKey. button on the SmartKey.
or
Insert the SmartKey into the ignition lock.
or
the To deactivate the alarm with KEYLESS-GO: press the Start/Stop button in the ignition lock. The SmartKey must be in the vehicle.
or
KEYLESS-GO. Lock or unlock the vehicle using KEYLESS-GO.
The SmartKey must be outside the vehicle.

    See also:

    Changing the settings of the locking system
    You can change the setting of the locking system in such a way that only the driver's door and the fuel filler flap are unlocked. This is useful if you frequently travel on your own. To change ...

    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 ...

    Roadside Assistance
    The Mercedes-Benz Roadside Assistance Program offers technical help in the event of a breakdown. Calls to the toll-free Roadside Assistance Hotline are answered by our agents 24 hours a day, 3 ...