You will need a double male jack like the one in the link below. You can go to any electronics store and ask for the cable.Plug it in the headphone jack of your iPod/Zune and then in the center stack next to the power outlet, plug the other end in the AUX jack. It will come on right when you plug it in if the car is on. If you plug it all in before starting the car push the AUX button on dash or use mode button on steering wheel to get to the AUX.
http://www.bestbuy.com/site/olspage.jsp?...