The Allroad was the only A6 with the RNS-E. I think the 2005 A6 is already the C6 which comes with the MMI system.
The MMI disc for the A6 won't work in an A4 version of the RNS-E, and vice versa (despite the A4 RNS-E saying "MMI" on the screen when you turn it on - confusing!).Aux1234 said:Didn't both the 2005 A4 and A6 have a RNS-E option? Shouldn't it be the same disc?