>> This seems bizarre - the head unit is obviously capable of reading Folders and Tracks but the Changer isn't. Is there anything anyone knows I can do to put this right? Or is there a CD Changer out there that is compatible with the BMW head unit and can show folders as well as tracks.

The only CD Changer that I know of that can correctly read folder/tracks and remain compatible with the BMW headunit is Alpine's own CHA-S634

In order for it to work correctly with the BMW headunit you would also need to purchase the additional Intravee interface which goes between the BMW I-BUS and Alpine AI-NET.

See my earlier post for full details.

http://www.xoutpost.com/stereo-system...interface.html