I have been thinking of retro fitting the RNS-E in place of my Concert Radio. I called the Rep at the garage where I bought my car and he says it was very expensive and almost impossible to do! I called in at another Audi dealer today and asked how much it would cost to fit the RNS-E to my new A3. Firstly he had never heard of the RNS-E!! Once I had explained what it was he then said it was almost impossible as I would need two new ECU's, a whole new wiring loom and the interior would need to be stripped out to accomodate the 'Motor Unit' and the Antenna!!! Cost? would be £3k to £4k Do these guys actually know what they are talking about or is he just trying to scare me?