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:

    Problems with the sliding sunroof
    Problem: the sunroof cannot be closed and you cannot see the cause. WARNING   You could be severely or even fatally injured when closing the sliding sunroof with increased closing force ...

    Adjusting the active multicontour seat
    The active multicontour seat on the driver's side automatically adapts the sides of the backrest to your current driving style. You can adjust the contour of the seats individually so as to pr ...

    Switching on DISTRONIC PLUS, storing the current speed and maintaining it
    Important safety notes WARNING The vehicle can be braked when DISTRONIC PLUS is activated. For this reason, deactivate DISTRONIC PLUS if the vehicle is to be set in motion by other means ( ...