The police cars (Mercedes-Benz C-Class & Opel Vectra) chasing Tom and Semir through the city both have "AP" (=Autobahnpolizei) licence plates, although they should have "K" (=Cologne) ones.
The derelict hotel is called "Pension Rheinblick" (Rheinblick = Rhine View), and the river Rhine is visible in the background. In the plot, that hotel is located in Bensberg, which is not located on the river Rhine.