I just got the iPhone 3Gs on Monday 9/14. So far everything is great, except for some reason the iPod feature is not playing clearly in my car. Has anyone else had this problem?? I have an iPod that plays great in the car and am using the same cord and cd player to hook up the iPhone but for some reason it sounds really muffled and there is a loud thumping and you can barely hear the music. I just dont want to have a defected phone... it's so brand new! What should I do? I have apple care. Thanks 