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:

    Tow-starting (emergency enginestarting)
    Vehicles with automatic transmission must not be started by tow-starting. This could otherwise damage the transmission. ...

    Using KEYLESS-GO to start the engine
    WARNING As long as the SmartKey is in your vehicle, the vehicle can be started. Therefore, never leave children unattended in the vehicle, as they could otherwise accidentally start the engin ...

    Switching on Blind Spot Assist
    ► Make sure that the radar sensor system and Blind Spot Assist are activated in the on-board computer. ► Turn the SmartKey to position 2 in the ignition lock. Warning lamps 1 light u ...