See also:

Massage function in rear seats
Wavelike motions from the top to the bottom in the backrest relax back muscles. Button in rear Switching on To switch on, press the button once for each massage level. The highest level i ...

Side airbags
In a lateral impact, the side airbag supports the side of the body in the chest and lap area. ...

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 ...