I've got an old Pioneer DEH P4100 that I hooked up a Pioneer PAC adapter to. Works great with an iPod. When I plug in my iPhone, it begins to charge, but it won't play the audio through the car speakers (just the iPhone speakers). I called Apple phone support and got transferred 7 times until the last person told me that as far as she knew, the iPhone was not supported for nor would it work in cars (which is ridiculous, but what can I say at that point?). Anyone have any ideas / what should I get to make this work? I could get an adapter that goes from Pioneer -> RCA -> 1/8", but then I have to plug in two things to get the iPhone charging and playing music.