See also:

Switch off the engine during longer stops
Switch off the engine during longer stops, e.g., at traffic lights, railroad crossings or in traffic congestion. Fuel savings are achieved after the vehicle is switched off for only approx. 4 s ...

Capacities
...

Automatic deactivation
In certain situations, the Automatic Engine Start/ Stop Function is deactivated automatically for safety reasons, such as when the driver is detected to be absent. Malfunction The automatic engin ...