General notes
If the vehicle can no longer be locked or unlocked with the SmartKey, use the mechanical key.
If you use the mechanical key to unlock and open the driver's door, the anti-theft alarm system will be triggered ().
There are several ways to turn off the alarm:
- To turn the alarm off with the SmartKey: press the
or
button on the SmartKey.
or
- Insert the SmartKey into the ignition lock.
or
- To deactivate the alarm with KEYLESSGO: press the Start/Stop button in the ignition lock. The SmartKey must be in the vehicle.
or
- Lock or unlock the vehicle using KEYLESSGO. The SmartKey must be outside the vehicle.
If you unlock the vehicle using the mechanical key, the fuel filler flap will not be unlocked automatically.
See also:
SmartKey battery
Important safety notes
It is advisable to have batteries replaced at a
qualified specialist workshop, e.g. at an
authorized Mercedes-Benz Center.
WARNING
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Driving on flooded roads
Do not drive through flooded areas. Check the depth of any water before driving
through it. Drive slowly through standing water. Otherwise, water may enter the
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