I recently changed my radio in my Fiat 500 2014 to a new Xtrons double din head unit and discovered that my mileage was flashing. Having checked loads of sites and forums there seems a lot written about how to fix it namely disconnecting the battery terminal, carrying out a proxy alignment etc but none seem to work, I therefore had an auto electrician carry out the diagnostics and do the proxy alignment but he was unable to resolve it. He did warn me that it probably wouldn't work and he was right but said he is aware of some sort of module that plugs into the back of the radio and tricks the car into thinking there's nothing missing. Does anyone know about this and where I might get it? He did say that he thought it was around £100