How many movies have Franz Xaver Lederle and Marianne Hoffmann collaborated on?

They have worked on 3 movies together! Their first movie together was When Night Falls on the Reeperbahn (1967) while their highest rated movie together was Der Arzt von St. Pauli (1968). They have not worked together since Bedroom Stewardesses (1978). They are most known for their crime films together.