OK, Jochen is the man, but still, to my knowledge this thread is the only documented BIT-II to TCU conversion on a Euro spec car that has succeeded and using the USA ones seem to be a common conversion. Jochen's on NavCoder supports the CDMA one well, the GSM one to a lesser extent (e.g. the pairing button works in the CDMA one only). The GSM (or CDMA) part of the TCU isn't used, all you and I want it to do is make the bluetooth work to the speaker and mic and the buttons on the wheel work. I will document the pin outs and post them here in the weekend.