The concept

The Auto 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.

Certain vehicle components may experience additional wear as a result of this system.

    See also:

    Under the Hood
    The 640i is powered by a 315-horsepower, turbocharged 3.0-liter six-cylinder engine. Its peak torque rating is 332 pounds-feet. BMW cites a zero to 60 mph time of 5.5 seconds for both the coupe an ...

    Parking brake
    The parking brake is primarily intended to prevent the vehicle from rolling while parked; it brakes the rear wheels. Indicator lamp The indicator lamp is lit, and when you drive off a signal soun ...

    Comparison with ordinary remote control
    The functions can be controlled by pressing the buttons or via Comfort Access. Should a short delay occur when opening or closing the windows or the glass sunroof/panoramic glass sunroof, the s ...