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.

The engine starts again automatically for driving off.

    See also:

    Malfunction
    A message is displayed in the instrument cluster. HDC is not available, e.g., due to elevated brake temperatures. ...

    Arrow view
    The following information is displayed during destination guidance: ▷ Large arrow: indicates the current direction of travel. ▷ Small arrow: indicates the next change in direction. ...

    Safety
    Both the coupe and convertible have front airbags plus side-impact airbags built into the front seats. As required of all 2012 models sold in the U.S., the 640i has standard antilock brakes and an ...