See also:

Fuel gauge
The vehicle inclination may cause the display to vary. Notes on refueling ...

Using the door lock
General information Locking from the outside Do not lock the vehicle from the outside if there are people in it, as the vehicle cannot be unlocked from inside without special knowledge.◀ ...

The concept
The automatic engine start-stop function helps save fuel. The system switches off the engine during a stop, e. g., in a traffic congestion or at traffic lights. The ignition remains switched on. ...