From reading the audio thread, I learned that our head unit (the one with navigation) was made by Becker and the compatible CD changer is the Becker Silverstone 7860. They are not easy to find in the States. EBay (UK and Germany) has them and they run between $375 - $450. New ones allegedly come with the CD magazine, the cable and mounting hardware. www.thebassbin.com.UK says they will ship to the United States. Their is a car audio store in Florida www.continentalimports.com which features them on their website, but you will need to call them to get the price. I am planning to call them this coming Monday, as they are closed on weekends. If they have it in stock at a decent price I will probably order it from them, since I am leery of purchasing it from overseas. If you want to explore further try EBay-Germany. They have sellers that offer new in the box units.

Hope this helps. Unfortunately their is not an interface that will allow MP3 or Bluetooth to be used with the stock unit. Alpine makes some nice units that incorporate those features.