Driving with start/stop function

The start/stop function temporarily switches off the engine when stationary and then starts it automatically when required.

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:

With automatic gearbox
  • Stop the car with the foot brake and then keep your foot on the brake pedal - the engine stops automatically.
With manual gearbox
  • Declutch, set the gear lever in neutral position and release the clutch 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 auto-stops approximately 3 seconds after the car has stopped.

Autostart

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

With automatic gearbox
  • 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 P5-1507-Cruise control, speed limiter, activates speed limiter from standby mode symbol 5x3,5 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.
With manual gearbox
  • With the gear lever in neutral position: Depress the clutch pedal or depress the accelerator pedal - the engine 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

P5-1507 Symbol Stop/Start inactive White - Appears in the tachometer when the function is available.

P5/P6-1917-Start/Stop Symbol, active Green - Appears in the tachometer when the function is active and the engine is auto-stopped.

P5-1507 Symbol Stop/Start not available Grey - The function is not available when this symbol is struck through and greyed out.

If no symbol is displayed, the function is disabled.

P5P6-1924-Start Stop A in circle symbol in gauge
The function is active and the engine is auto-stopped.

For cars with the eight-inch driver display, the symbol is displayed at the bottom of the speedometer.

  1. 1 Hill Start Assist