This might help cmdfire, and you Deako you need VCDS go to controller 37 navigation and in one of the setting which is for the MFSW you need to untick it to say its not fitted, for some reason it conflicts with the setting on the can gateway and you get limited use of your steering wheel buttons.
When I first fitted my RNS I could only use the vol buttons but unticked the mfsw and every thing worked and I have a version E gateway,
I also fitted the Vw premium BT kit and as long has you have a nokia it should work I have the N96 and it works fantastic so much info in there, when I get a text through it comes up on the FIS and I can do my speed dials on the rns
Darren