When Casey takes Geran's car and pulls up in town for the meeting with Kahl, the aerial shot shows it parked with a space of more than one car's length behind. When the shot changes and Casey exits the car, there is a car parked directly behind.
The couple drives a beetle from 1965 in pristine condition. Also in Germany this is highly implausible for a couple which barely has enough money for the rent.
When Juliette leaves her dialysis appointment (and the bad guys are looking for her) there is no trace of a dialysis port or even a bandage on her arm where it would be (based on the earlier scene where the nurse is setting her up at the dialysis machine).
A truck driver who drives 48 hours without break from Rotterdam would presumably leave Europe and be in Asia (or deep in Russia). The drive from Rotterdam to Cologne is about 4 hours by truck.
There is an English "Quick and Cool" sign on the wall inside the petrol station. The petrol station is supposed to be in Germany.