When Charlie drives onto the Austrian town square and the camera focuses on a street sign that says "Kleinalm, Gutigplatz", there's a green building in the background with the words "Kavárna Spalícek" written on it. "Kavárna" means "café" in Czech, revealing that the scene was actually filmed in the Czech Republic, not in Austria.
When Charlie puts the keys in the exhaust immediately after parking the car, the question begging here is, how does she not burn her fingers?
They mention a hotel as being in Maribor, Slovenia. This taking place in the 70s they would have said Yugoslavia, as Slovenia was a part of that country until the early 90s.