Dirk,AudiA4B6US said:Based on what has been posted so far you would need to find the speed wire in your 2003 A6 as well. Only the A3/A4 models have speed over CAN. If you have your phatbox connected now it should work fine after setting the new head unit type. Just make sure you get an RNS-E adapter with support for a CD changer, that's how the phatbox is connected to your radio.
Does the version for phone support handle the OEM integrated phone/OnStar...or just the 3 pins/wires for radio muting, speaker + and - ? I'm putting in an aftermarket BT HF kit (moto IHF1000).
I think I'm going to start piecing together the parts that I need for this install...and I will start with the wiring harness(s).
Time to get serious about this!!