Hello, I have a similar problem, my car si audi a6 2001, 2.5 tdi quattro, my navigation system is locked, and dont recognise my code in my car book, one year ago its worked with the same code. I sending a video. Can you help me please. I had another problem with my car and i disconnect the fuse from box, and from then my navigation system doesnt work. http://bit.ly/audiA6video Thanks in advance!