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
• switch off the ECO start/stop function or switch to drive program S or M
• unfasten your seat belt or open the driver's door

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 temperature in the vehicle interior deviates from the set range.
• the charge level of the battery is too low.

    See also:

    Charging the battery
    WARNING Never charge a battery still installed in the vehicle unless a battery charger unit approved by Mercedes-Benz is being used. Gases may escape during charging and cause explosions ...

    Temperature
    WARNING The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading, either separatel ...

    Activation conditions
    You can activate the HOLD function if: • the vehicle is stationary. • the engine is running. • the driver's door is closed or your seat belt is fastened. • the parking brake is not applied. • the ...