With these Golf's when you press the "ECON" switch you will not notice a "Clonk" or drop in "Revs".
The reason is that the Compressor when idling is still working about approx 10% this when "ECON" lite. (I know never use the "ECON" setting)
My local Halfords don't understand this so get confused. Also they can't understand the gas pressures readings on this car.
So as said before go to a VW dealers or air con specialist
