chatting a mate last night, no reason why having the bluetooth prep would mean that the shark's fin aerial would be required! the car i presume acts as a giant hands free kit, so no need for an aerial.
losing faith in the knowledge of the dealers...
also did a little more reading on the fiscon and parrot kits. both appear to offer use of steering wheel buttons, the fiscon seems to use the RNS (i.e. sat nav) but no mention of the RCD510
http://fiscon-mobile.com/products/versions_vw.phpthe websites do not appear to be updated for the Mk6 and the best bet is prob to call them direct to find out compatability.
re: my earlier statement on getting the VW one, the big issue is that the limited compatability will hinder my wife's use of the kit, or anyone else i sell to, plus it will lock me to a certain range of phones. can't believe VW have screwed this one up so royally. was this an issue on the Mk5 too?