Well then. I didn't know you had the mk2 installed! How did you get that working in the D2? I thought there were issues with the firmware / canbus in that version? Presume that's a mk1 A6 surround cut down to suit the D2 dash and fitted on to the mk2 buttons? Odd place to put the aux in though
Would't it be easier to put that in the centre console?
While the RNS-e is a nice option to have, I can't see how many people could justify spending four figures on a head unit when better aftermarket units are available for £300. I don't see it devaluing the car to the average punter either since most aftermarket units come with Bluetooth and USB now too, making them actually useful compared to the RNS-d. If the car is sold to an enthusiast who actually wants a useless 20 year old brick in the dash then I have a stack of RNS-ds which I use as bookends
Its simple enough to re-fit the original if its important.