Here is the problem I'm dealing with. The CD changer is in the trunk, stacked with the Nav electronics and cellphone electronics. Here is a pic:
The problem occurs because the cable in the "back" of the PhatBox comes straight out and has no room to bend. The PhatBox sticks out too far for the cover panel to close. Below, on the left is the PhatBox with the cable attached. On the right I have detached the cable and moved the PhatBox back far enough to clear the cover:
Newsflash!!!
I got my Audi cable today and hooked it up. Wow! This PhatBox sounds... well... PHAT!!! All I need is a right-angle cable and I'm all set.