Oil level measurement C30 1.6D

Moin, so yesterday I replenished some wiping water and was amazed to get almost 4l into it… Where I was then just trying to look for oil and so on… But, somehow it doesn’t work out with the 1.6D to read off a reasonable oil level. Yesterday evening, about 1.5h after setting off the vehicle on a flat surface, oil rod out, wipe away completely again and carefully looked, the complete yellow cone is covered with oil. 3-4 times tries not to get an oil level between the two markings, always the complete cone covered with slightly black oil. Again 3h waited, no success. This morning (>12h later) after “overnight” also no success. What’s my thinking error? rod maybe not entirely to measure?! How to normally measure the oil level is clear to me, so please not a principle discussion…. – Is it possible that I can easily measure the level of oil right there? – Is my oil level just too high? – I have this Castrol Longtec 0W30 oil in there, and the coolness of a few times.