See also:

Programming HomeLink® (for U.S. owners)
The HomeLink® compatible transceiver in your vehicle has 3 buttons which can be programmed to operate 3 different devices. Refer to the programming method below appropriate for the device. 1. ...

Adjusting sound quality and volume balance
Press the “TUNE/SEL” knob to enter iPod menu mode. Pressing the “TUNE/SEL” knob changes sound modes.  - About iPod • Apple is not responsible for the operation of this device o ...

Changing the display
Switches between odometer and trip meter displays. When the trip meter is displayed, pressing and holding the button will reset the trip meter. ...