My Oil level sensor is not exactly what would call precise...06 CDI but 8.0 liters is slightly too much, 7.0 slightly too little. I trust dipstick more and live with occasional overfilled warning and use 8.0 liters in it.

In my cars commuter role of 85-100 miles a day my oil temp gets plenty high even in winter to boil out impurity and blowby products. That said I use Mobil 1 5w40 in Benz specification, change filters every 5k and oil 10-15k. My car has 223k miles now. Oil consumption in 15k miles is less than 400ml. I’ve seen this rate or less for last 160k miles. So when I change oil I usually do 8 liters, on warm days red overfill warning comes on 7-9 miles of highway after startup, on cold days 16-23 miles. My current oil has been in for 10k miles and overfilled warning has only extended 2 miles of highway use. The sensor is not stupid accurate as stated, but this is a handy way for me to watch for consumption at my higher mileage. Just my thoughts?