Factual error: The movie takes place in the 70's, but Sheriff Wydell's truck is a 1981 or newer. The front grill was used from 1981 to mid 80's.
Factual error: The 4-wheel-drive Meredith van Aken is using to pick up Jonathan Cold and the black box has got a German registration plate for Berlin. However there are no discrimination letters after the "B" for Berlin, but a 5 digit number starting with "3." Only police cars carry registration plates like this in Berlin.