check out two places: to get a std. MB changer, look on EBAY. To get aftermarket ones check out autotoys.com I got a MB changer for my ML for $200 on EBAY (at a dealer it is over $600). On the Autotoys, that have one for around $350 that is a drop in but actually holds 8 CDs instead of only 6, and supposedly works with the standard Bose head unit. Worthalook. They also show detailed examples, phots, etc.