How many movies have Frank-Otto Schenk and Martin Trettau acted in together?

They have worked on 5 movies together! Their first movie together was Verwandte und Bekannte (1971) while their highest rated movie together was Meines Vaters Straßenbahn (1980). They have not worked together since Meines Vaters Straßenbahn (1980). They are most known for their drama films together.