How many movies have Horst Pinnow and Klaus Sonnenschein acted in together?

They have worked on 4 movies together! Their first movie together was Liebe Mutter, mir geht es gut (1972) while their highest rated movie together was Der Pfingstausflug (1978). They have not worked together since Und plötzlich bist du draußen (1981). They are most known for their drama films together.