AT last! With the help of an item from this bulletin board from an AUstralian dealer regarding a retrofit and the CIP 20 I now have MP3 on my May 05 Nav-equipped E90! MP3's can only be played fron thge shuttle, which is fine for me!
CIP 20 has also jacked up the phone side and seems to have speeded up the idrive response.
Arctic 320i Steptronic I-drive and all extras including chrome window/grille mouldings.