How many movies have Karl Merkatz and Peter H. W. Tost collaborated on?

They have worked on 1 movie together! Their first movie together was Der Waldbauernbub - Weihnacht in der Waldheimat (1983) and was their highest rated movie together. They have not worked together since Der Waldbauernbub - Weihnacht in der Waldheimat (1983).