If you ever watch "Car Wash", there are VWs in almost every scene where you can see a street, just driving by. Thing is, I doubt it was planned. That's just what it looked like in the 70s when it was just Detroit and VW! Also, one of the characters drives a Splitty in a couple of scenes.
Also, Stephen King is the man! I've read most of his books and the last movie I saw was "The Mist". It stayed pretty true to the short story and, although I don't remember the story's ending exactly, the movie's is awesome! Worth renting.