"You seem to be having some real trouble there. What's the problem with the dipstick method? In the manual, for almost every 1.9 TDI/SDI, there's definitely a sentence stating that it should be about 4.5 liters. And that's always in the separate booklet with the technical data. But no offense, you should be able to find that information, and if not, it shouldn't be too difficult to figure out. Just pour in exactly 4.5 liters, start your car, let it run, and if almost all of it hasn't drained out, you'll have a good amount too much in there. That's not good. Do it like this: pour in four liters, let it run briefly so that oil also reaches the filter, turn it off, wait 3 minutes, and then use the dipstick to check the level and fill it up to the maximum mark.
You unscrew the bleed screw beforehand and then screw it back in without changing anything. It's not that difficult.
But be careful, oil will come out when you unscrew them.
I always reuse the gaskets. Afterwards, don't overtighten the screw, as you could otherwise damage the oil pan.