How many movies have Karl-Eberhard Schäfer and Norbert Walter collaborated on?

They have worked on 20 movies together! Their first movie together was Messerscharf - Tödliche Wege der Liebe (2002) while their highest rated movie together was Ein Teufel für Familie Engel (2007). They have not worked together since Mit der Tür ins Haus (2019). They are most known for their comedy films together.