ok, I have a 2004 A6 w/ factory xm radio. I purchased a grom audio ipod hookup that connects to the factory cd changer on the back of the symphony stereo. But when I turn back to xm radio it looks like everything works except no sound!!! :( Anyone know how to fix this? I thought I bought the vehicle specific cable to avoid getting rid of my xm radio. I'd like to get this figured out tonight cause I leave for a trip tomorrow morning....
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