I have a adapter in my car it is called a PIE adapter where I can hook my ipod up to it and control it through the factory stereo it works great anywayz it is not the standard audio hook up that goes into a headphone jack instead this hooks up to an ipod in the spot the same cable you use to charge and sync the iphone / ipod. My girlfriend had the same thing in her car and a older iphone not 3g and hooked it up and it kind of made the iphone freakout for a couple of days and she had to reset it factory restore. So I am kind of scared about doing this but has anyone else out there actually done it? I know it will work if you hook it up to headphone jack but I don't have that. Thanks.