Apparantly I cant either

The guy who owned the car before me did such a piss poor job wiring the car, that its not fixable. I have to pretty much gut the soundsystem and rewire it all. that'll probably take a few months. im askin this everywhere, so if you see it somewhere else, its still me: Does anyone know if the later 4th gens can with an option to have an equalizer on the cd player? Or if they came with a stock CD Changer option?