I just got the Radio Module replaced in my '02 X5 and now see TR-01 on one side and CD1 on the other, indicated that I now have the version capable of dealing with MP3's, Aux In etc. I bought it in Dec 0f '05 and thought that the CD Changer they put in would be capable of playing/decoding MP3's. I burned a CD using iTunes (MP3 CD) and all I got was electronic static. Is it possible that even as of Dec '05 the dealer still had older non MP3 capable CD changers in stock?