Thanks for the heads up on this.
Will have to monitor our Q3 for changes in oil level.
Personally, I don't do anything at the dealer maintenance related for fear they will screw up simple things up.
Like not tightening the oil drain plug properly.
I'm still not sure if Audi uses a suction oil extractor to pull the old oil out or do they get underneath the car & let the oil drop out the oil fashion way.
Since the filter is up top like most German cars, I'd figure they extract from up top.
But back on topic - like you pointed out, the catch 22 is that there is no way to document their screw ups if you don't go to them.