Controversial & Contradictive
Why not ring up audi and see if they can change the order to a symphony unit instead of the concert. The symphony unit is the same size as the RNS-E, and it means that there is a lot less work to change out the symphony to a Nav unit.
As Craig said, it is possibly, and he is just the man to do it for you. He's a top bloke and he'll treat your car like it's his own.
53 A4 2.5TDi Quattro Sport 180 Tiptronic. Heated Buffalino leather, DVD Sat Nav RNS-E, TV, Bluetooth, 6 cd, BOSE, Colour DIS, Cruise Control, Auto lights and mirrors, Interior light pack, Heated mirrors.