As far as I can see, the sunroof works fine. I wonder if it was iced up when Katie said it didn't work?
Did you happen to try remote convenience functions? Having looked at the label file just now re: fogs, I see it requires coding and possibly adaptation (A061).
I've reverted the 's coding to what we had in 2011 -- 0424125.
However, that did not fix the "01502 - Bulb for Rear Fog; Left (L46)" fault, which will not clear.
Curiously, it retains the 2018.05.16 date stamp. Yes, the car knows today is December 2.
I don't see any rear fog options in the coding, or in adaptations. There are two Selective Output Tests, one for each side. I suppose it's possible the lamp is always present and always diagnosed, regardless of whether the car is delivered in a region with a rear fog-capable headlight switch installed.
If it bothers you (I know it would bother me
) you could pull the bulbs out and have a look. I don't have access to an A6 repair manual at present, to see where rear fog lamp would be positioned. Maybe it's a separate bulb, maybe it's activation of an existing light, maybe it's a dual-filament bulb and one side is burnt out, or not present because an incorrect single-filament bulb has been used.
I don't have rear fogs and I'm not sure what they're supposed to look like. The SOTs imply you should have one on each side, so you could compare left and right, possibly swap bulbs. You could also trigger the SOT for the right side to see what it looks like, if anything, and for the left, to see if it influences the stored fault in any way (might go intermittent/clearable, or bring the date current, or who knows).
Edit: did some Googling, looks like they are essentially your red taillights in a bright mode, not white/clear like your reverse lights, bright as the brake lights but not in the same physical position. So check for two taillight bulbs with one burnt out, or a single bulb with dual filaments with one burnt out, etc.