BMW 5 Series: Automatic mode - Automatic Engine Start/Stop 
Function - Driving - Controls - BMW 5 Series Owners ManualsBMW 5 Series: Automatic mode

The automatic engine start/stop function is operational after each engine start.

The function is activated above a certain speed.

▷ Manual transmission: above 3 mph, approx.

5 km/h.
▷ Automatic transmission: from 5 mph, approx.

9 km/h.

    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. ...

    Engine stop
    The engine is switched off automatically during a stop under the following conditions: Manual transmission: ▷ Neutral is engaged and the clutch pedal is not pressed. ▷ The driver's ...

    See also:

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    Cooling fan, hose and connections
    Your vehicle employs an electric cooling fan which is thermostatically controlled to operate when the engine coolant reaches a specific temperature. If the radiator cooling fan does not operate eve ...