Do these values add to the calculation of the stab trim value for takeoff?From where in the real world do these values come (loadsheet,...)? I can imagine that ZFWCG can be derived from the plane geometry and loading and that the FMS can calculate TOCG by looking how fuel is distributed, but I cannot think of having TOCG available for entering it into the MCDU...

Yes, they are the basis for the calculations.What is the problem with TOCG? It is simply CG recalculated without taxi fuel.

The tutorials would have helped to clear this up for you.Here's what you do:When you load the aircraft using the PMDG MD-11 Load Manager, it will give you the ZFWCG. When you are finally on the flight deck, on the INIT pages, enter the ZFWCG in the appropriate area. If the aircraft is being fueled, wait until the fueling is complete. Once it is complete, or if the aircraft was already fueled, look at the system display (4th screen from the left, and make sure the ENG page is displayed). At the top, the current CG is displayed. Assuming you won't be taxiing for more than 10-20 minutes, it's safe to say that the CG displayed here can be entered as the TOCG.If you use a program such as TOPCAT, you will see that the dispatch sheet gives you both values - ZFWCG and TOCG. You would enter both at that moment, regardless of fueling (the reason you wait until after fueling is because the system must compute the value fully loaded from the ZFWCG you entered - if you're still being fueled, it's not calculating the fully loaded value) because it's been computed for you. If the TOCG you entered is too far from what the aircraft systems calculate, it will alert you. Using TOPCAT is advantageous as well, because it will calculate the TOCG after taking out the anticipated taxi fuel requirement.Here's an example for my flight I've planned for later tonight:

BALANCING/TRIM CONDITIONSMACZFW 22.43%MACTOW 25.93% STAB TRIM: FMCMACLDW 25.36%MAC LIMITSZFW FWD 12.00% AFT 31.55%TOW FWD 13.35% AFT 34.00%LDW FWD 12.00% AFT 34.00%

You'll note LDW is also shown here. This is not entered into the system at all. Rather, it's here so that I know that after burning off fuel, I will not be out of balance by the end of the flight. I can easily compare the BALANCING/TRIM CONDITIONS to the MAC LIMITS below and see they are all acceptable.Here is the tutorial. My explanation above is very similar to that on Page 7.