Yes. The ULF is a bluetooth only module. The TCU from 2005 onwards, are Assist with Bluetooth combo modules.

THe TCU part # you refer to 84 11 6 946 993 is a Assist/Bluetooth combo unit. This was the first generation, which did not include voice recognition functionality.

You might find this useful ..

http://www.xoutpost.com/articles/all-...r-history.html