The toilet didn't have "shelf" that was common in Europe, especially in the Eastern Europe, for many decades until 1980s when the "shelfless" toilets became more common.
The taxicabs in Germany are required to be painted in specific shade of ivory color (German: Hellelfbein or RAL1015). The color on the taxicabs in the scene is bright white.
The police cars arriving at the hotel have wrong livery. The German police cars have the white body with green doors, hood, and trunk until 2000s when the new livery was introduced.
A maroon-colored Chevrolet Caprice parked in the background is 1986-1991 model as depicted by composite headlamps and lozenge-shaped external rear view mirrors. The story takes place in 1978.