How many movies have August Rieger and Hans-Jürgen Bäumler collaborated on?

They have worked on 4 movies together! Their first movie together was Ein Engel namens Schmitt (1967) while their highest rated movie together was Schwarzwaldfahrt aus Liebeskummer (1974). They have not worked together since Schwarzwaldfahrt aus Liebeskummer (1974). They are most known for their comedy films together.