The Start/Stop function is activated automatically when the engine is started with the key. The driver is made aware of the function by the function's On/Off button symbol lighting up in the combined instrument panel and the On/Off button lamp illuminating.
All of the car's normal systems such as lighting, radio, etc. work as normal even with an engine that has stopped automatically, except that some equipment may have the function temporarily reduced, e.g. the climate control system's fan speed or extremely high volume on the audio system.
Auto-stopping the engine
The following is required for the engine to auto-stop:
| Conditions | M/A1 |
|---|---|
| Declutch, set the gear lever in neutral position and release the clutch pedal - the engine stops automatically. | M |
| Stop the car with the foot brake and then keep your foot on the pedal - the engine stops automatically. | A |
If the ECO function is activated then the engine may auto-stop before the car is completely stationary.
For certain engine variants the engine may auto-stop before the car is stationary regardless of whether the ECO function is activated.
When the engine is auto-stopped, the combined instrument panel's symbol for the Start/Stop function illuminates.
Auto-starting the engine
| Conditions | M/A1 |
|---|---|
With the gear lever in neutral position:
| M |
| Release the foot pressure on the foot brake - the engine starts automatically and the journey can continue. | A |
| Maintain foot pressure on the foot brake and depress the accelerator pedal - the engine auto-starts. | A |
The following option is also available on a downhill gradient:
| M + A |
Deactivating the Start/Stop function
In certain situations, it may advisable to temporarily switch off the automatic Start/Stop function - this is carried out with a push of this button.
Disengaged function is indicated by the combined instrument panel's Start/Stop symbols and the button's lamp extinguishing.
The Start/Stop function is disengaged until it is reactivated with the button or until the next time the engine is started with the key.
Start assistance HSA
The foot brake can also be released on an uphill slope to auto-start the engine - the HSA (Hill Start Assist) function prevents the car from rolling backwards.
HSA means that the pressure in the brake system remains temporarily available while the driver's foot is moved from the brake pedal to the accelerator pedal for driving off with the engine having stopped automatically. The temporary braking effect releases after a couple of seconds or when the driver accelerates.