SiMpLyMoDiFiEd

I have a 2011 A6 "facelift" I have been told its a C6 and also told its a C6.6? Well I went in and did the VIM, DRL LED, rear DRL, and BT AMI mod but now my fuel gauge doesn't work properly. Does anyone know the fix? or how to reset everything? The VIM, Rear DRL worked but the DRL LED brightness mod and the BT AMI mod did not.


Thanks in Advance