How many movies have Alfred Johst and Heidi Mahler collaborated on?

They have worked on 12 movies together! Their first movie together was Ohnsorg Theater - Trautes Heim (1970) while their highest rated movie together was Ohnsorg Theater - Das Herrschaftskind (1972). They have not worked together since Ohnsorg Theater - Rum aus Jamaika (1977). They are most known for their comedy films together.