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:

    Locking the vehicle
    If the vehicle can no longer be locked with the SmartKey, you can lock it by taking the following steps. ► Close the front-passenger door, the rear door on the front-passenger side and the ...

    Loading a trailer
    - When loading the trailer, make sure that neither the permissible gross weight of the trailer nor the gross vehicle weight are exceeded. The permissible gross vehicle weight is indicated on t ...

    Engine emergency off
    If the engine cannot be switched off as described, observe the following procedure: Take the fuse allocation chart out of the vehicle document wallet. Search for “Emergency engine shutdown” ...