How many movies have Dietmar Koelzer and Michael Busch collaborated on?

They have worked on 3 movies together! Their first movie together was Doppelpack - Das Duell (1999) while their highest rated movie together was Alles Verbrecher: Eiskalte Liebe (2014). They have not worked together since Alles Verbrecher: Eiskalte Liebe (2014). They are most known for their crime films together.