Conditions for the Start/Stop function

Updated 19/03/2020

For the Start/Stop function to work requires that a number of conditions are met.

If any condition is not met, this will be indicated in the driver display.

The engine does not auto-stop

The engine does not auto-stop in the following cases:

The car has not reached approx. 10 km/h (6 mph) after starting.
After a number of repeated auto stops, speed must again exceed approx. 10 km/h (6 mph) before the next auto stop.
The driver has unfastened the seatbelt.
The capacity of the starter battery is below the minimum permissible level.
The engine is not at normal operating temperature.
The ambient temperature is under -5 °C (23 °F) or above approx. 30 °C (86 °F).
The windscreen's electric heating is activated.
The environment in the passenger compartment deviates from the set values.
The car is reversed.
The starter battery's temperature is below or above the permitted limit values.
The driver makes sweeping steering wheel movements.
The road is very steep.
The bonnet is opened.
When driving at high altitudes when the engine has not reached operating temperature.
The ABS system has been activated.
In the event of heavy braking (even without the ABS system having been activated).
Many starts during a short period of time have activated the starter motor's thermal protection.
The exhaust system's particulate filter is full1.
A trailer is connected electrically to the car’s electrical system.

The following applies to automatic gearbox:

In the following cases the engine does not auto-start after having auto-stopped:

With automatic gearbox:

The driver is unbelted, the gear selector is in P position and the driver's door is open - a normal start must take place.

With manual gearbox:

If a start-up fails and the engine stops, proceed as follows:

Check that the driver side's seatbelt is locked in the seatbelt buckle.
Depress the clutch pedal again - the engine starts automatically.
In certain cases the gear lever must be set in neutral position. A message is shown in the driver display - follow the recommendation given.

In the following cases, the engine auto-starts even if the driver does not take his/her foot off the brake pedal:

High humidity in the passenger compartment forms misting on the windows.
The environment in the passenger compartment deviates from the set values.
There is a temporarily high current take-off or starter battery capacity drops below the lowest permissible level.
Repeated pumping of the brake pedal.
The bonnet is opened.
The car starts to roll or increase speed slightly if the car auto-stopped without being completely stationary.

The following applies to automatic gearbox:

The driver's seatbelt buckle is opened with the gear selector in D or N position.
The gear selector is moved from D to R or M (±) position.
The driver's door is opened with the gear selector in D position - a "ping" sound and text message indicate that the ignition is on.

Do not open the bonnet when the engine has auto-stopped. Switch off the engine normally before lifting up the bonnet.