So, the manual says the tank in my 1980 w116 300SD is 82L with 14L reserve. Now is that reserve included in the 82L?

I drove it until my needle fell dead and then filled it with 80L of fuel. My low fuel light never came on, but is the tank really 96L? Perhaps I just never hit the reserve.

My fuel gauge needle is off by about 1/8 of a tank. Shows less then there really is, but it still works. I was hoping the light would still work.

Does anybody know if the tank capacity quotes in the FSM include the reserve or not?