Rudolf Augstein said that his target is it to have Franz Joseph Strauß resigned However it is not true. Augstein saw Adenauer as a bigger problem as he refused a German reunion. He also didn't hate Strauß but had respect for him as a private person, especially for his intelligence and for his education. But he didn't agree with his politics.
The research against Strauß for the article about the Nato maneuver "Fallex 62" was not run by Augstein but by journalist Conrad Ahlers. Augstein didn't really like the article in real life.
Colonel Alfred Martin didn't contacted Spiegel because he wasn't promoted but because of his own political views.
The movie ends with the line "If the secret documents were found in the save or the original with the source marks, it would have been state treatment." However the officials have found the expose of the article and Colonel MArtin was arrested as the informer.
Eventhrough Rudolf Augstein lived a long time in Hamburg, he didn't have a Hamburg Accent as in the movie. He was born in Hannover where accent-free German is spoken.
According to people who knew the work at "Spiegel" confirm that the communication within the editor's newsrooms were professional and not buddy-like as it was shown in the movie.