See also:

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" ...

Distance to back of head: electrical head restraints
The head restraint is automatically repositioned when the shoulder support is adjusted. ...

Features
Like most up-level BMWs these days, the 650i can be equipped with a dizzying array of technological wizardry. Ours came equipped with an optional lane departure warning and correction system, adap ...