I had this error whilst fiddling about with the range adjustment on VCDS. I must admit that I did panic a bit, but eventually worked out that because I'd accessed the values field and not saved my measurements, the control unit had had assessed it was broken. Saving the values in VCDS rectified the problem which hasn't arisen again since.
Good luck getting it fixed.
3.0 TDI Sport, 6MT, black, cream leather/alcantara electric seats (with key memory mod), Audi parking system plus, hill hold assist, folding photo-chromatic mirrors, S5 mirror housings, 2013 DVD nav MMI Hi 2G, 5570 firmware, B&O, 6CD, AMI, iPhone cradle, cruise, 19" Ys, 15mm hub-centric spacers all round, Audi Drive Select Individual, lap timer, VCDS and a massive grin