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:

    Safety & Features
    The S-Class has not been crash-tested by the Insurance Institute for Highway Safety. Standard safety features include eight airbags, an electronic stability system and antilock brakes. Click here ...

    Automatic headlamp mode
    To switch on automatic headlamp mode: turn the light switch to or . SmartKey in position 1 in the ignition lock: the parking lamps are switched on or off automatically depending on the br ...

    Setting a speed
    WARNING Keep in mind that it may take a brief moment until the vehicle has made the necessary adjustments. Increase or decrease the set vehicle speed to a value that the prevailing road con ...