Ok, so Bose is a go ahead, what next can be added to bring it up to RNS-E spec? This is a 2012 quote from AudiSRS...........
"In my cars
RS4 = RNS-D
B6 A4 = RNS-E
Main difference I find is the screen, miles better on the RNS-E.
Everything else (for me) is nigh on the same in all honesty. Radio frequency selection is a bit better in the RNS-E, though that's nit picking.
Sat-nav, in terms of actually getting you where you want to go (how often do drive along looking at the pretty display??) are both comparable (RNS-D = 2011 maps, RNS-E = 2011 maps)
Both play CD's, both used to play TV (before switch off) both have MMI boxes attached and reverse cameras working. RNS-E has built in SD card reader, my RNS-D has an aftermarket interface allowing SD cards, usb sticks. bluetooth streaming and line in.
Apart from the screen on the RNS-E and the fact it looks lots more modern, the difference isn't enough for me to rip out the RNS-D in the RS4 and replace with the RNS-E (I even have a spare RNS-E)
All in my honest opinion of course :thumb:"
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So it seams the only real life downside to the RNS-D when compared to RNS-E is it doesn't have an inbuilt sd card reader. There's the X car link that will provide this but how does that get supplanted into the A2 without being in your face. Does anyone have any pics of it installed? Would the X car link provide a way of playing music via some device? Sorry to be such a technophobe but i'm still using Vinyl.