I am not sure about the filming location of this movie. The story seems to be set in Frankfurt/Germany. The cars have German number plates with "F"s. On the other hand I think I recognized some Viennese streets. I am sure that the Philips building which can be seen @ 0:20:21 is the Viennese head quarters of Philips (Wien Favoriten, Triesterstrasse 64). One of the characters (the assistant of Richard Kowalski) pretends to speak a Viennese dialect, the way it is imagined by Germans ... very funny!
All in all the movie captures the atmosphere of the late 60s in Vienna quite nicely.
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