When the Chrysler Vision is hit by a truck, it changes into a Ford Probe.
Semir's black BMW has a plate from Munich (M) on scenes filmed on open roads, and a plate from Neuss (NE) on closed roads - the Munich-plate indicates it's a free gift from BMW.
The same thing on the black Porsche: On open roads, it has a plate from Ludwigsburg (LB), which means that the car was provided by Porsche itself, and on closed roads, the plates are from Cologne (K).
Some special squad cars have plates from Hamburg (HH) - they are rental cars.
Although interior- and exterior-shots were filmed at Düsseldorf Airport, the last exterior shot shows Köln Bonn airport.