See also:

Unbuckling the belt
1. Hold the belt firmly. 2. Press the red button in the belt buckle. 3. Guide the belt back into its reel. ...

Switching the interior lamps on and off
Press the button. To switch off permanently: press the button for approx. 3 seconds. Switch back on: press button. ...

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 ...