The only way to get it 100% working is to change the flap to a single flap
No wiring change will make it mist up
changing some of the wiring will reduce the misting up but it still won't work fully as changing the flap
It seems this is the case. With the wiring change and fixing the broken latch on the inner motor, I now got both flaps moving correctly with the recirc button. But, the movement is not flawless. Sometimes the flaps just get stuck half way. Most of the time they work ok though and I sprayed some lubricant to the moving parts yesterday and that seems to have helped for the most parts.
Anyway the more annoying issue is that I cannot clear this fault :
9472882 - Motor for Fresh Air / Recirculated Air Flap
B108B 54 [009] - Missing Calibration / Basic Setting
Confirmed - Tested Since Memory Clear
I've done the basic setting numerous times with VCDS and through the climatronic panel buttons. No dice. Flaps move correctly when I observed them during the basic settings routine but still the error appears all the time.
It does not affect the climatronic in any way but is an annoying issue.