Driving with start/stop function

Updated 19/03/2020

The Start/Stop function temporarily switches off the engine when stationary and then restarts it automatically when the journey is resumed.

The Start/Stop function is available when the car is started and can be activated if certain conditions have been met.

The driver display indicates when the function is

Available
active
not available.

All of the car's normal systems such as lighting, radio, etc. work normally, even when the engine is auto-stopped. However, some equipment may have its output temporarily reduced, e.g. the climate control system's fan speed or extremely high volume on the audio system.

Auto-stop

The following is required for the engine to auto-stop:

Stop the car with the foot brake and then keep your foot on the brake pedal - the engine stops automatically.

In drive mode Comfort or Eco, the engine may auto-stop before the car is completely stationary.

With adaptive cruise control or Pilot Assist activated, the engine will auto-stop after approximately 3 seconds.

Autostart

The following is required for the engine to auto-start:

Release the brake pedal - the engine will autostart and you can continue driving. On an uphill gradient hill start assist (HSA1) engages, which prevents the car from rolling backwards.
When the Auto Hold function is activated, auto-start is delayed until the accelerator pedal is depressed.
When adaptive cruise control or Pilot Assist is activated, the engine will auto-start when the accelerator pedal is depressed, or by pressing the button on the left keypad of the steering wheel.
Maintain foot pressure on the brake pedal and depress the accelerator pedal - the engine auto-starts.
On a downhill gradient: Release pressure on the brake pedal slightly so that the car begins to roll - the engine will auto-start after a slight speed increase.

Symbols in the driver display

With 12-inch driver display*

The text READY is shown in the tachometer when the function is available.
A pointer in the tachometer points to READY when the function is active and the engine is auto-stopped.
The text READY is greyed out when the function is not available.
No text is shown when the function is deactivated.

P5-1507-StartStop READY symbol in gauge — The function is active and the engine is auto-stopped.

With 8-inch driver display

The symbol is shown in the lower edge of the speedometer.

Symbol	Specification
	White symbol: The function is available.
	Beige symbol: The function is active and the engine is auto-stopped.
	The function is not available, the conditions are not fulfilled.
	No symbol is shown when the function is deactivated.