How many movies have Erwin C. Dietrich and Renate Larsen collaborated on?

They have worked on 3 movies together! Their first movie together was Champagner für Zimmer 17 (1969) while their highest rated movie together was Porno Baby (1974). They have not worked together since Heißer Mund auf feuchten Lippen (1975). They are most known for their crime films together.