Horn
Pressa 
on the steering wheel pad
to sound the horn.
See also:
Playing an MP3 or WMA (in Either the DVD or CD Slot)
If a disc is inserted into the top DVD slot, the rear seat operator can turn on the video screen and use the remote control to navigate the CD (tracks only).
(Tune): Turn to select MP3/WMA files.
...
Four-Wheel Drive
If the vehicle has Four-Wheel Drive, you can send the engine's driving power to all four wheels for extra traction. ...
Playing the Radio
For vehicles equipped with the MyLink or IntelliLink infotainment system, see
the separate MyLink/ IntelliLink Features and Functions Guide for more information.
Audio Source
VOL/ (Power/Volume): ...