How many movies have Dieter Salzmann and Günther Maria Halmer collaborated on?

They have worked on 3 movies together! Their first movie together was 21 Liebesbriefe (2004) while their highest rated movie together was Mord in aller Unschuld (2008). They have not worked together since Ladylike – Jetzt erst recht! (2010). They are most known for their crime films together.