In the scene when Jerry goes to Visit Cush you can clearly see that he drives up in a Dodge Intrepid...but when he leaves and you get to the scene where it shows him driving off, you can see that it's not an Intrepid. I think that's a pretty big mistake.
Perhaps, because he travels so much, he does not actually own a car and rents instead. It would therefore make sense that his car could be different at different parts of the film.