How many movies have Herbert Fleischmann and Horst Niendorf acted in together?

They have worked on 3 movies together! Their first movie together was Sie werden sterben, Sire (1964) and was their highest rated movie together. They have not worked together since Liebe mal so - mal so (Vergnügliches über ein altes Thema) (1975). They are most known for their comedy films together.