How many movies have Achim Neumann and Dorothea Rau acted in together?

They have worked on 5 movies together! Their first movie together was Love in 3-D (1973) while their highest rated movie together was Sex Clinic '74 (1973). They have not worked together since Lustig ist die Jodelei bei der Fummelfilmerei (1974). They are most known for their comedy films together.