When Monroe shows his Christmas decorations to Rosalee he points out a German Santa Claus with reindeer from 1928. The German Weihnachtsmann never had reindeer. They are an American thing.
An Austrian says that 3 bodies were found 50 miles away. Austria, like most of Europe, uses the metric system so it should have been either 50 kilometers or 80 kilometers if it really was 50 miles away.
The silver Audi A4 has license plates starting with "C". That prefix is not used in Austria.
The traffic sign at the accident site shows the number 115 in white letters in a green square, signifying an E-road. The sign misses the "E" which normally precedes the number. Additionally, E-road 115 is located in Russia, not Austria.