How many movies have Claus Obalski and Gerhard Heinz collaborated on?

They have worked on 4 movies together! Their first movie together was Nackt und heiß auf Mykonos (1978) while their highest rated movie together was Who Is That Splashing in the Mediterranean? (1980). They have not worked together since Who Is That Splashing in the Mediterranean? (1980). They are most known for their comedy films together.