Multi-channel playback, surround
Choose between stereo and multi-channel playback, surround.
Setting multi-channel playback, surround
1. "CD/Multimedia", "Radio" or "Settings".
2. "Tone".
3. "L7 Surround"

When surround is activated, multi-channel playback is simulated when a stereo audio track is played.
LOGIC7 and LOGIC7 logo are registered trademarks of Lexicon, Inc., a Harman International Group company.
See also:
Child seat security
The rear safety belts and the front passenger
safety belt can be locked against pulling out for
mounting the child restraint fixing systems.
Locking the safety belt
1. Pull out the belt webbin ...
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 ...
Automatic headlamp control
Switch position : the low beams
are switched
on and off automatically, e.g., in tunnels, in twilight
or if there is precipitation. The indicator
lamp in the instrument cluster lights up.
A bl ...
