Hi, everybody, I've recently bought an 8P with a RNS-E retrofitted, everything worked perfectly until I decided to upgrade it. After upgrading, it started to ask me the PIN, I had one written on a card, but the serial number didn't match the one showing on the screen, so it was not valid. Then I tried to buy a PIN online, providing the serial number I see on the screen, and it didn't work either. You can see a video here: I tried to buy it from two different sellers who gave me the same number (eBay seller returned me the money, but onlineradiocodes - co - uk refuses to return me the money or help me any way. I don't recommend you dealing with those people) I took my car to an Audi store, but they said that as my radio is retrofitted they can't do anything, they charged me half an hour of manwork to say that their can-bus can't connect to the RNS-E. I'm pretty sure that my RNS-E is connected to the CAN-BUS because I can see the current street number showing on my dashboard screen (FIS?). So today I tried to take away the radio and see if it has a different serial number printed on it, but... I can't even see any number printed on it, I've uploaded some photos of it here: Any help will be really appreciated. Thanks!