Issuing a warning

If the vehicle begins leaving the lane and a lane marking has been detected, the steering wheel begins vibrating.

If the turn signal is set before the lane is changed, a warning is not issued.

Canceling a warning

The warning is canceled:

▷ Automatically after approx. 3 seconds.
▷ After the vehicle returns to its lane.

▷ During heavy brake application.
▷ When the turn signal flashes.

    See also:

    Snap-in adapter
    Installation locationIn the center armrest. Inserting snap-in adapter 1.  Press the button and remove the cover. 2.  Insert the snap-in adapter at the front, arrow 1, and press downward, ...

    Displaying the button assignment
    Use a finger to touch the buttons. Do not wear gloves or use objects. The key assignment is displayed at the top edge of the screen. ▷ To display short information: touch the 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 ...