How many movies have Arno Steffen and Daniel Koppelkamm collaborated on?

They have worked on 3 movies together! Their first movie together was Das Wunder von Lengede (2003) while their highest rated movie together was Der Untergang der Pamir (2006). They have not worked together since Besondere Schwere der Schuld (2014). They are most known for their drama films together.