See also:

Connecting headphones
You can connect headphones with a jack plug or operate them using the infrared interface. To enable optimal use of the infrared interface, use infrared headphones that comply with the IEC 61603 ...

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

Controls
The audio and video sources can be controlled using the: > Buttons near the CD/DVD player > iDrive > Buttons on the steering wheel, > Programmable memory keys, > Voice activation s ...