The same car (Black VW) with the license plate "1TAH240" is seen parked next to the truck of Carter, early in the movie (29:09). It's the same car, Paul and Angela are arriving in at the tree farm later in the movie (58:12).
In the Netherlands there is no such thing as ice diving. When there is ice, which is rare, it is used for ice skating. Icediving during a Christmas holiday is lazy script writing: temperatures in December in the Netherlands are above 0.