Rider69

I connected right to the Acc line and GND in the factory harness. You don't want to use the constant 12V, then the Sirius box will be on all the time. If ou want to get really into it, you could wire up a relay using the remote turn on from the Avic as the signal wire.

Second audio output so the rear monitors will have their own audio.

I was kinda hoping to see the same thing, but there is not one. Basically, I will be putting monitor in the headrests and was going to use a wireless headphone setup so the rear passengers can watch a movie or whatever, while I listen to the radio/CD/Sirius. have to try and figure out how I can get it to work. If not, the D3 will go back or be sold.