Apologies for the resurrection, but I didn't want to be accused of not using the search function, did I?
I would also like to fit an RCD510 in place of my 300. My car is a late 2007 and it has an armrest CD changer fitted. So to the questions:
1) Will I need this upgraded CANBUS controller?
2) Is the RCD510 a direct swap with regards to the connections at the rear? (apart from the aerial, which I know about)
3) If I were to swap out the changer for an MDI/iPod dock, would it use the same cable going back to the headunit?