Tell me about it. It appears that there are two versions of what is available for the X5. One is the ULF module, which is now at version 11 I believe, and the other is the TCU/Assist module, which also has gone through numerous revisions. As far as I know, the most recent TCU/Assist module is P/N 84 10 9 115 729 from 10/2006. If anyone has more up to date information than this please let me know. What I am still confused about is what happened in 9/2005. According to everything I have been able to find, no new TCU/Assist module was introduced at that time so why are more phones suddenly compatible? For obvious reasons I'd like to get those part(s).