How many movies have Helen Vita and Rudolf Schündler acted in together?

They have worked on 4 movies together! Their first movie together was Treibgut der Großstadt (1967) while their highest rated movie together was Was ist denn bloß mit Willi los? (1970). They have not worked together since Jürgen Roland’s St. Pauli-Report (1971). They are most known for their comedy films together.