See also:

Use coasting conditions
When approaching a red light, take your foot off the accelerator and let the vehicle coast to a halt. On a downhill gradient, take your foot off the accelerator and let the vehicle roll. The flo ...

Stowing cargo
Heavy cargo: stow as far forward and as low as possible, ideally directly behind the cargo area separating wall. Very heavy cargo: when the rear seat is not occupied, secure each of th ...

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 ...