How many movies have Klaus Werner and Tonio von der Meden collaborated on?

They have worked on 3 movies together! Their first movie together was Schoolgirl Report Part 1: What Parents Don't Think Is Possible (1970) and was their highest rated movie together. They have not worked together since Schoolgirl Report Part 13: Don't Forget Love During Sex (1980). They are most known for their drama films together.