I have used he AUX input with a USB plug for my MP3 player and the small IPod and it worked great. Now I got the nicer IPod and it won't read it. It is giving me a READING ERROR. Thinking that I had gotten a bad IPod, I took it back to Best Buy and had the guy check it. We plugged several other IPods into the input and got the same results. He suggested taking the car back to the dealer and getting a Firmware upgrade. Has anyone had that problem?