A6 C8 40 TDI MHEV also, 2,500 miles today, about 6 weeks from collection. My Audi app indicated to check oil level about 10 days about likely around 2000 miles, it wasn't at minimum but was low on the gauge, so added 1/2 litre of 0W-30 to spec (see label on radiator cover under the bonnet). Seems that the App gives a warning before the point where you'd reach minimum, so I check that regularly. There was no warning from the car at this point, only in the app.