Here is the information I put together on the ID3 text.

http://www.bimmernav.com/bmw_mp3_cd_changer.html

1) make sure the ID3s are formated correctly
2) make sure that you enable Audiotext

The radios I know work are

65.12.6.988.275
P/N 65 12 6 976 961
65 12 6 976 962