How many movies have Gustav Kampendonk and Ralf Wolter collaborated on?

They have worked on 5 movies together! Their first movie together was Schlag auf Schlag (1959) while their highest rated movie together was Natürlich die Autofahrer (1959). They have not worked together since Freddy und das Lied der Südsee (1963). They are most known for their comedy films together.