How many movies have Riccarda Merten-Eicher and Rolf Wappenschmitt collaborated on?

They have worked on 4 movies together! Their first movie together was Ein Kuckuckskind der Liebe (2005) while their highest rated movie together was Wenn wir uns begegnen (2008). They have not worked together since Northmen: A Viking Saga (2014). They are most known for their tv movie films together.