I did A-Level German, and I had to write a 2000 word essay on an aspect of modern German life. I chose film, and my teacher recomended "The Princess and the Warrior" and "Run Lola Run" (Both in German, and to me, "Der Krieger und die Kaiserin" and "Lola rennt") This film was hard to understand at first, and some of the language was slightly complex, but the cinematography itself, the plot, camera work and the roles of the actors themselves was simply amazing! Franka Potente is very well known in Germany, and having seen quite a few of her films, I think this is her best!
The plot itself is very plausible, and has you believing in it, the anguish both Sissi and Bodo are going through and the tragedy in their lives. I highly recomend!