Here's your manual: http://service.us.panasonic.com/oper...model=CQDF583U
Took 30 seconds in google by searching the make & model.
As far as using the CD changer, there are adapters that will allow the CD Changer input to be used as a generic AUX. There may be one for your unit. Try PAC-AUDIO first. They specialize in this sort of adapter.