I recently bought a 2007 Santa Fe, wich is working pretty good. The only problem I have is that I have not been able to connect a phone or audio input in the car. It comes with an input thinner than the 3.5 mm plug, has the steering wheel commands, but it does not work. I found an adapter to the thinner plug, but nothing happens when I connect anything. I read in a manual that I have to press for a few seconds the headphones button on the steering wheel, but nothing happens.

Thank you in advance.