Immobilizer

The immobilizer prevents your vehicle from being started without the correct SmartKey.

When leaving the vehicle, always take the SmartKey with you and lock the vehicle. The engine can be started by anyone with a valid SmartKey that is left inside the vehicle.

To activate with the SmartKey: remove the SmartKey from the ignition lock.
To activate with KEYLESS-GO: switch the ignition off and open the driver's door.
To deactivate: switch on the ignition.

when you start the engine. The immobilizer is always deactivated when you start the engine.

In the event that the engine cannot be started when the starter battery is fully charged, the immobilizer may be faulty.

Contact an authorized Mercedes-Benz Center or call 1-800-FOR-MERCedes (in USA) or 1-800-387-0100 (in Canada).

    See also:

    Unlocking the trunk (mechanical key)
    The trunk lid swings upwards when opened. Therefore, make sure that there is sufficient clearance above the trunk lid. If the trunk cannot be unlocked with the SmartKey or KEYLESS-GO, use the ...

    Important safety notes
    You will find an illustration of the instrument cluster in the "At a glance" section (). WARNING A driver's attention to the road and traffic conditions must always be his/her ...

    Important safety notes
    Cruise control maintains a constant road speed for you. It brakes automatically in order to avoid exceeding the set speed. On long and steep downhill gradients, especially if the vehicle is la ...