How many movies have Horst Kotterba and Jan Josef Liefers acted in together?

They have worked on 2 movies together! Their first movie together was Ernst Thälmann (1986) while their highest rated movie together was Vergewaltigt - Die Wahrheit und andere Lügen (1997). They have not worked together since Vergewaltigt - Die Wahrheit und andere Lügen (1997).