Wrighty ST

Hello everyone. I've just signed up because I have a problem on my Audi A4 and the forum I use for my other car is very helpful. My a4 is a 2006 S line auto tdi. And hasn't missed a beat since I bought it until now. It's absolutely brilliant on a long drive. My other car is a ford focus ST. It's currently running 324BHP and 411lb/ft. It's got I/C, 3" turbo back exhaust. DSCI induction kit, 440cc injectors and forge re-circ valve. Here it is.

Hi can anyone help me please. The display on my 2006 A4 diesel (auto) went off a few weeks ago and I cannot find any info on line. The car drives fine in auto and semi-auto. Has anyone had this problem before. And help will be much appreciated.