See also:

Tire inflation pressure values over 100 mph/160 km/h
320i   328i 335i ...

Sound output via speakers
In addition to the headphones, you can also play the sound via the vehicle speakers. 1. "CD/Multimedia" 2. "External devices" 3. "AUX rear" 4. "Volume" 5 ...

Reference
This chapter contains technical data, short commands for the voice activation system, and an index that will quickly take you to the information you need. ...