How many movies have Gunter Otto and Sylvia Engelmann collaborated on?

They have worked on 3 movies together! Their first movie together was Liebesgrüße aus der Lederhose 5. Teil: Die Bruchpiloten vom Königssee (1978) and was their highest rated movie together. They have not worked together since Insatiable Janine (1982). They are most known for their history films together.