Conditions for the Start/Stop function

Certain conditions must be met for Start/Stop to function.

If any condition is not met, this will be indicated in the instrument panel.

The engine does not auto-stop

The engine will not auto-stop if:

  • The vehicle has not reached a speed of ca 10 km/h (6 mph) after starting.
  • After several auto-stops, the speed must again exceed approximately ca 10 km/h (6 mph) before the next auto-stop.
  • The driver has not fastened the seatbelt.
  • The engine is not running at its normal operating temperature.
  • The ambient temperature is under approximately -5 °C (23 °F) or over approximately 37 °C (98 °F).
  • Windshield heating is activated.
  • The climate system settings and the actual climate in the passenger compartment differ.
  • The vehicle is in reverse.
  • The driver is making large steering wheel movements.
  • The road gradient is very steep.
  • The hood is open.
  • Driving at high altitude and the engine has not reached its normal operating temperature.
  • ABS has been activated.
  • Hard braking (even if the ABS system has not been activated).
  • Many starts during a short period of time have triggered the starter motor's overheating protection.
  • The exhaust system's particulate filter is full.
  • A trailer is connected to the vehicle's electrical system.
  • The transmission is not running at its normal operating temperature.
  • The gear selector is in mode M (±).
  • If traffic conditions allow it (for example in a traffic jam).

The engine does not auto-start

The engine will not auto-start after an auto-stop if:

  • The driver is not wearing a seat belt, the gear selector is in the P position and the driver's door is open. The engine must be started normally.

The engine auto-starts while the brake pedal is depressed

In the following situations, the engine will auto-start even if the brake pedal is depressed:

  • High levels of condensation on the inside of the windows.
  • The climate system settings and the actual climate in the passenger compartment differ.
  • The brake pedal is pumped repeatedly.
  • The hood is open.
  • The vehicle begins to roll or increases speed slightly if the engine auto-stopped before the vehicle was at a standstill.
  • The driver's seat belt is unbuckled with the gear selector in the D or N positions.
  • The gear selector is moved from D to R or M (±).
  • The driver's door is opened with the gear selector in D. An audible signal and a text message informs the driver that the ignition is on.

 Warning

Do not open the hood if the engine has auto-stopped. Turn off the engine by switching off the ignition before lifting the hood.

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