Hi, I wanted to share the final solution in my case, because maybe it will help someone with the same problem. My car is a 2017 Skoda Kodiaq with the Swing / MEN2 unit. My unit details were: Software train: MEN2_EU_SKGPx_P6473L Installed MU version: 8170 Device part number: 565 035 871 Hardware: 612 Software: 8170 Bluetooth version: C160 SmartLink application: 0043 The problem was that after patching/unlocking the EEPROM, SmartLink was still not working correctly. I originally thought the EEPROM patch itself might be the full solution, but in my case it was not enough. The missing part was the FEC/SWaP codes. The EEPROM was unlocked/patched, but the required FEC codes for SmartLink were not added to the unit. I do not know exactly how to add FEC codes myself. I know there are people offering this service for a fee, for example through online adverts, and I used one of those services. After the FEC codes were added properly, SmartLink started working. So in my case the solution was: EEPROM unlock / patch Add the correct FEC/SWaP codes for SmartLink Before that I also tried firmware update routes, but my unit had MU 8170 and I was getting the error: “Source signature could not be verified” So the firmware update was not the real fix in my case. The important part was that the FEC codes were missing after the EEPROM unlock. Maybe this helps someone with MEN2.