So, my GTD was supplied with a white collar lightning adapter for the MDI port. No surprise, my iPod wouldn't connect which I knew it wouldn't after reading everything on here and realising it was the green collar cable I needed.
I've been in contact with my supplying dealer (which isn't my most local dealer) and they are adiment that the white collar cable is the one I need. They have asked that I go to my local VW dealer, ask them whether it is the green collar lead that I need and get them to try one in my car and report back.
Feel like I'm being fobbed off here and doing all the legwork for something which isn't my fault, or am I missing something?!