Mark, you just reminded me of something.
How do I drain off the coolant in the heads? I want to make sure the old coolant stuff (plus oil, rust etc.) is entirely cleared from my new cooling system before I pour in new water and MB antifreeze. Will the usual method of draining the coolant (that is, by unscrewing the plug below the radiator housing) do?
Also, can anyone tell me what is the volume of liquid in a W126 cooling system? I know about the 50/50 mix, but I do not know how MUCH (litres or gallons) to mix.
1983 W126 (280SEL)