How many movies have Günter Schlesinger and Klaus J. Merl collaborated on?

They have worked on 3 movies together! Their first movie together was Dark Nights in St Pauls (1966) while their highest rated movie together was Das Geständnis eines Mädchens (1967). They have not worked together since Straßenbekanntschaften auf St. Pauli (1968). They are most known for their drama films together.