For this Film Dieter Hallervorden prepared himself by jogging every day for nearly six months. As a result he lost 11Kg weight.
The climax running scenes were shot during the real Berlin Marathon, making it very difficult, because people recognizing Dieter Hallervorden (a well known German actor and comedian) and constantly waving towards him or the camera.
The actual Berlin Marathon has never finished at the Olympiastadion. The first marathons in the 1970s were held in the Grunewald forest. From 1981 to 2002 the finish line was at Kurfürstendamm, since 2003 it has been at the Brandenburg Gate.