If you want to use a phone with the stock head unit, you'll have to order the BNA-1319-116 cable from Becker North America: http://www.beckerautosound.com/parts...rt_number.html

Then, you'll have to buy a separate bluetooth kit for your phone. The Motorola IHF1000 works according to other members here.

I don't know if any CD changers work with the stock head unit. You'll have to search the forums.