Hi,
I finally was able to burn the BMW Audio Books to a CD that plays in my Professional Radio (non iDrive). I noticed that the bit rate was less than 44.1Kbps on all of the files. So, even though the files say "MP3" from BMW, I converted tham to MP3 using iTunes. I also set the ID3 tag to version 1.0 as a previous response suggested.
Well everthing works correctly. I went back and downloaded the books form BMW again and noticed some differences. I still converted everyone over using iTunes.
Wallyf