well ,i thinks its a bit easyer to fit electronic flap control than it is to retrefot dual zone climatronic. I'm still researching ,finding out bits and pieces for this retrofit. On paper it's really easy ,2009 golf mk5 has electronic flap control and it can be done without any other modifications ,just the basic out with the old ,in with new, My car is '04 ,so i have manual flap control (shaft,wire) it means more modifications but not something as complicated as fiting climatronic. cheers