From what I have gleaned and tried very late 05s onwards will recognise mp3 cds. Mine from sept 05 does not. It just comes up with no disc. I have heard that if you put an mp3 disc in it might come up with some error message but then play ok. So do not be put off by an error message just try it.

Again as I understand it it is a cd changer hardware issue but I will keep an eye on this thread to see what wisdom comes.

John