As above, you will need it coding for Dynaudio, not a big problem and if you are stuck I can help out, I'm probably about an hour and a bit away from Cov, CW5 post code. I'm sometimes in Birmingham, maybe once a month or so, next time might be 30th March as I have a Cisco exam there & also have an office in town, so could meet then if you needed.
I've just disabled voice commands rather than mess around with another mic, so that the star button simply repeats the last navigation command.
Your RCD 510 will definitely be worth something. Also from what I know (or what I've been told anyway), the dealer won't be able to get the code for the RCD 510 unless it is connected to the car. I was told VW no longer provide the radio codes. Not sure about the truth in this, but it may have been recorded during PDI as mine was, so ask your salesman if they can check their documents.