How many movies have Christian Anders and Gerhard Heinz collaborated on?

They have worked on 3 movies together! Their first movie together was Hilfe, ich liebe Zwillinge! (1969) while their highest rated movie together was Das haut den stärksten Zwilling um (1971). They have not worked together since Das haut den stärksten Zwilling um (1971). They are most known for their music films together.