No line-in option showing up for 2007 Ford Fusion?

I have my phone plugged into the the aux input, but when i press the aux button on the radio it cycles through sat 1, 2, and 3 without ever switching to the line-in option. How can i get this option to show up?

Hi so as this is now 10 years old and Ford never make radios last for ever. Maybe time to buy a new one.

Your owner's manual should tell you that. Try one more time, but with the phone playing a program for the stereo to sense.