Automatic engine start

The engine is started automatically if you:

 - release the brake pedal when HOLD is not activated and the transmission is in position D or N
 - shift the transmission to position R
 - depress the accelerator pedal
 - have switched off the ECO start/stop function by pressing the ECO button
 - switch to drive program S, S+ or M
 - unfasten your seat belt or open the driver's door

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The engine is also started automatically if:

 - the vehicle starts to roll.
 - the brake system requires this.
 - the system detects moisture on the windshield when the air-conditioning system is switched on.
 - the charge level of the battery is too low.
 - the driver's seat belt is removed or the driver's door is opened.

    See also:

    Cleaning the headliner and carpets
    – Headliner: use a soft brush or a cleaning agent recommended and approved by Mercedes-Benz to remove heavy soiling. – Carpets: use the carpet and textile cleaning agents recommended and appr ...

    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 ...

    Shifting to neutral N
    When the vehicle is stationary, depress the brake pedal. Push the DIRECT SELECT lever up or down to the first point of resistance. If the engine has been switched off, the automatic transmis ...