I had a problem when I overfilled with adblue from a pump, and the full tank did not register as it had done the previous six times over 3 years. (2016 2.0 TDI). The mileage warning kept ticking down and I was worried the engine might get to the point where it would not restart. My local independent repairer recommended a soft ware fix. This eliminated the adblue messages and apparently I won't ever need to use adblue again. After the modification the stop/start engine function disappeared and I got 30% increase in engine performance. Engine shape warning light came on again after 500 miles, but car is running fine.
