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 ...

Switching on/off manually
Press the button. ▷ On: the LED lights up. ▷ Off: the LED goes out. If Top View is displayed, switch on the backup camera via the iDrive, ...

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 ...