Ignition on

Press the Start/Stop button, and do not press on the brake pedal at the same time.

All vehicle systems are ready for operation.

Most of the indicator and warning lamps in the instrument cluster light up for varying lengths of time.

To save battery power when the engine is off, switch off the ignition and any unnecessary electronic systems/power consumers.

The ignition switches off automatically:

  • When the vehicle is locked, if the low beams are switched on.
  • Shortly before the battery is discharged completely, so that the engine can still be started.
  • If the engine is switched off and the ignition is switched on, the system automatically switches to the radio ready state when the door is opened if the lights are switched off or the daytime running lights are switched on.
    See also:

    The concept
    The Auto Start/Stop function helps save fuel. The system switches off the engine during a stop, e.g., in a traffic congestion or at traffic lights. The ignition remains switched on. The engine s ...

    Transmitting the settings
    Your personal settings can be taken with you to another vehicle equipped with the Personal Profile function. For more information, contact your service center. Transmission takes place via: ...

    Malfunction
    The yellow warning lamp flashes and then lights up continuously. A Check Control message is displayed. No flat tire can be detected. Display in the following situations: A wheel without T ...