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:

    Driving safety systems overview
    In this section, you will find information about the following driving safety systems: - ABS (Anti-lock Braking System) - BAS (Brake Assist System) - BAS PLUS (Brake Assist System Plus*) - ESP® ...

    Switching off the engine
    Important safety notes WARNING   Do not turn off the engine before the vehicle has come to a complete stop. With the engine not running, there is no power assistance for the brake and s ...

    Winter driving
    Important safety notes WARNING   If the vehicle becomes trapped in snow, ensure that snow is kept away from the exhaust pipe and from around the vehicle as long as the engine is running ...