Your dealer is right about the SAT harness. I have a MY05 A4 and the location for the reciever is right where he said it is. Look over on Audiworld.com under tech, there is an article called "Factory XM Radio Self-Install".racervw said:Is your vehicle pre-wired for SAT? That's what I'm looking for; the harness from the trunk to the pass kickpanel. I spoke to the dealer and they told me that the SAT harness is integrated into the interior vehicle harness and I must purchase the entire harness. My ETKA only goes to 2003 so I can't personally verify this. Now I'm looking for '04 at the wrecking yards to hack the harness out of. Otherwise I'll have to just make one.