The only one I have had out was my 81 300D Euro parts car. On that one there are two manual controls, one to regulate the passenger side heat, one for the drivers side.
I asked around to see if I could install the manual controls on my 300D with ACC? Could not find if that has the same system or not. Could have it though. Maybe those great engineers across the pond made it that complex? Used the ACC to contol passenger and driver side heat?
Na, not possible.