Applies to: vehicles with start/stop system
The on-board control system can override the start/stop function for various reasons.
Engine does not switch off
The system checks that certain conditions are met before and during each stop phase. If the indicator lamp 
appears on the instrument cluster display, the engine will not be switched off in the following situations:
appears on the instrument cluster display, the engine will not be switched off in the following situations:- The engine has not yet reached the minimum temperature required for start/stop mode.
- The interior temperature selected on the air conditioner has not yet been reached.
- The exterior temperature is very high/low.
- The windscreen is being defrosted.
- The park assist* is switched on.
- The vehicle battery charge is too low.
- The steering wheel is close to full lock or the vehicle is being steered.
- Reverse gear has just been selected.
- The vehicle is on a steep gradient.
- At high altitudes.
Engine cuts in again automatically
The stop phase is interrupted in the following situations, for example. The engine cuts in automatically without intervention from the driver.
- The vehicle starts to roll (e.g. on a hill).
- The interior temperature deviates from the air conditioner setting.
- The windscreen is being defrosted.
- The brake pedal is pressed several times in succession.
- The vehicle battery charge drops to an insufficient level.
- The power consumption is high.
The engine switches off again when the conditions for start/stop mode are once again fulfilled.
Ignition is switched off automatically
To prevent the vehicle battery from being discharged, the ignition will be switched off automatically if certain conditions are met. For instance:
- The start/stop system has switched off the engine.
- The vehicle is stationary.
- The driver has left the vehicle and the engine has not been restarted within approximately 30 seconds.
In this case, the following message will be displayed in the instrument cluster: Ignition will be switched off automatically and the side lights will be switched on instead of the dipped headlights. After approx. 30 minutes, or when you lock the vehicle, the side lights will be switched off.
The ignition is also switched off if the vehicle is locked from the outside during a stop phase.
If the start/stop system has not stopped the engine or if you have switched off the start/stop system manually, the engine will continue running and the ignition will not be switched off automatically ►.
Note
Applies to: vehicles with automatic gearbox
- The parking brake will automatically be applied if you leave your vehicle while the selector lever is in the D/S or R position.
- If you select D or N after selecting reverse gear, the car must have been moving at over 10 km/h before the system can switch off the engine again.