How many movies have Fred Liewehr and Werner Jacobs collaborated on?

They have worked on 4 movies together! Their first movie together was Hilfe, meine Braut klaut (1964) while their highest rated movie together was Onkel Filser - Allerneueste Lausbubengeschichten (1966). They have not worked together since Wenn Ludwig ins Manöver zieht (1967). They are most known for their comedy films together.