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 and convertible. The standard eight-speed automatic transmission includes steering-wheel-mounted shift paddles.
Other standard features include computer-controlled adaptive shock absorbers and Driving Dynamics Control, which allows the driver to adjust the ride quality, accelerator response, power-steering assist level and automatic transmission behavior.
Optional mechanical upgrades include active stabilizer bars and active steering, the latter of which adds rear-wheel steering to the earlier generation's variable-ratio front steering system.
See also:
Switching the high beams on and off
manually
High beams on, arrow 1.
High beams off/headlamp flasher, arrow 2.
To reactivate the High-beam Assistant, press
the button on the turn signal lever. ...
Destination entry via voice
General informationFor instructions on the voice activation system.
> During the destination entry by voice, you can switch between voice entry and
entry via iDrive at any time. To do so, reacti ...
Automatic deactivation of the front
passenger airbags
The system determines whether the front passenger
seat is occupied by measuring the resistance
of the human body.
The front, knee, and side airbag on the front
passenger side are activated or d ...