How many movies have Herbert Übelmesser and Ralf Gregan collaborated on?

They have worked on 3 movies together! Their first movie together was 5 Bed Bunnies on the Loose (1972) while their highest rated movie together was Swingin' Swappers (1973). They have not worked together since The Sinful Bed (1973). They are most known for their comedy films together.