In the A6 C5 and A4 B5 you will need to find the speed signal behind the instrument cluster, regardless whether or not it't a Euro or US RNS-E. Only the A3 8P and A4 B6/B7 units get all signals over CAN.
Those will work great. Just plan on mounting the GPS antenna when you have the cluster out...as it will save you time down the road.hutton1969 said:Many thanks for the clarification. I will rely on the photographs and instructions which are on http://audi.ogdenlabs.com/installation.htm