I just came across your thread and realized that while we have different cars, we might have similar climate control systems. We for sure have the same problem.. Maybe the Euro thing makes for similar systems. What year is your machine ? I am enclosing the thread I wrote. See if it is in any way familiar. Only thing, My duo valve is a four prong connector - two to each valve. You seem to have a three prong ?

126 Duo Valve - what's with the heat...