I just tried to do this guide https://www.fiatforum.com/grande-punto-guides/127299-generic-mp3-input-active-hu-4.html?p=2056684 and there is something already in the aux slot. I think it may be something to do with the blue and me usb slot. Is there anyway around this. I have a new 09 plate Grande Punto.

Do you have Blue&me installed in your car?

i have the same problem, and i have blue&me installed. The radio is a Grundig GHT1400 and it got al the pins at the back of its (blue green and yellow)

Hope you have a solution for me