there isn't one, you have to add one, Ford has a kit called trip tunes,
part #6R3Z-19A464-AA that you can purchase and install, this will allow you to connect your Ipod
and listen to your tunes thru the factory speakers, also you'll be able to control the volume, but you will not be able to control the functions of your Ipod with the radio, also there are
a number of aftermarket kits that you can buy that allow you to control everything thru the radio but they are alot more then the $50.00 that Ford wants.