Yea the thing you're talking about is the car kit. Really crappy and ghetto. Why don't u just invest some money in a aftermarket HU with a single cd player or just look around for a factory cd changer. Yea factory cd changers are more expensive. Better yet...they have cd changers for about $80 that are fm modulated. Meaning no wires needed to connect with the headunit but instead it "taps" in to the fm tuner.