For my 07 V6, the aux button is for switching between satellite radio and "line in", which is the setting it needs to be on to play my ipod. The jack to plug in my ipod was located in the center console behind the shifter. It's just a little hole in the front of the compartment.
I could be mistaken, but I don't think they began putting in this jack until the 07 models, so I don't believe your
stang has it. Again, I could be mistaken, but if you have it, that's where it will be located.
And if you do have it, the ipod does not plug directly into the jack. You need to purchase a stereo cable to connect the jack to the ipod. I got mine for like 10 bucks at walmart. If yours doesnt have the jack, the only thing I can thing of is an FM adaptor. I'm sure other people on here have more advice regarding this.
Hope it helps...
