I got this on ebay.... one of the greatest things is the a2dp bluetooth... which lets me finally use my iphone 5 and stream music through the stereo.(can control iphone wiht steering wheel !) The phone quality is pretty decent as well with the built in mike.

http://www.autodvdgps.com/bmw-5e39bm...en-p-1030.html

This is the guy i got it from:
http://www.ebay.com/itm/251049779695...84.m1427.l2649