How many movies have Heidi Kappler and Rolf Bauer collaborated on?

They have worked on 6 movies together! Their first movie together was Und mehrmals täglich quietschen die Matratzen (1973) while their highest rated movie together was Between the Covers (1973). They have not worked together since Funny Boys und Funny Girls (Die amourösen Abenteuer zweier Freunde) (1984). They are most known for their comedy films together.