Originally Posted by lvmyhnda

it means that it is able to read the info of the disk so it will play the songs in mp3 format. there are a few aftermarket pieces that will allow you to hook up an aftermarket mp3 player such as an ipod to your factory headunit. but it doesnt plug into the front of the head unit.. it uses the factory cd changer plug to display and control the mp3 player through the display of ypur radio