The police cars shown in the scenes supposedly set in Berlin look nothing like German police cars. Real German police cars are not black and do not have red numbers on the side.
Instead they are usually green and white in most German states, blue and white in others. Since the bombing scene was set in Berlin, the police cars should have been green and white.
When the the agent's body is dumped in the street of Berlin, the initial shot is panning out from a sign that reads Berliner U(-bahnhof). There is no such station - the closest in name is Berliner Straße on the U7 line, which would be at most abbreviated to Berliner Str.