Originally Posted by brentb
I believe the USB connection is used for playing music through the iPod app only. Why not just plug an audio cable from the headphone jack into the jack on the car. Then select aux instead of iPod from the stereo. Don't expect the radio or steering wheel controls to do anything but adjust the volume though.
I bet this is the best post. the ipod integration is most likely designed for browsing thru the music on your iphone, not playing music from apps.
the aux cable should work, you just wont be able to skip songs...I normally just listen to whatever shuffles up in the app I am playing anyway.