Lumbar support
The curvature of the seat backrest can be adjusted in such a way that it supports the lumbar region of the spine. The lower back and the spine are supported for upright posture.

- Press the front/rear section of the switch. The curvature is increased/decreased.
- Press the upper/lower section of the switch. The curvature is shifted up/down.
See also:
Opening/closing the glass sunroof
When the sliding visor is open, proceed as described
under Sliding visor. ...
Treble, bass, balance, andfader
► "Treble": treble adjustment.
► "Bass": depth adjustment.
► "Balance": left/right volume distribution.
► "Fader": front/rear volume ...
Camera monitoring: Lane Departure Warning System and Collision Warning
The Lane Departure Warning System available for the new BMW 3-Series Sedan is
activated at speeds above 70 km/h (43 mph) and warns the driver if he
unintentionally strays out of his lane. The syst ...
