When the girlfriend is driving the Mercedes, the sound and appearance of her shifting makes it seem like a manual transmission, however the console shifter shows it's an automatic.
Race cars have their doors welded shut for safety purposes. It would not be possible to open the door and bail out. Additionally, when the race car flips a regular gas tank is shown under the car near the bumper. Race cars of this type use special safety tanks mounted in a more secure area of the car.
Race cars are required to have full roll cages, and neither car has one.
Race cars use five point harnesses to keep drivers from being ejected and to protect them from being thrown around inside the car. The car had none.
At about the half way mark Lori Wright is driving a new Mercedes given to her by Mark Landy. Wright is running the gear shifter up and down as if she's shifting gears. When the camera pans down to the shifter it's clearly an automatic. She keeps pushing it into park and down to low. The car would have dropped its transmission on the ground in a normal situation.
The sign at the auto dealer shows a bunch of arrows pointing in random directions with random distances to major European cities. The directions are wrong as well as the distances. All the cities are in Europe so the directions should be close to same from Los Angeles, but they are pointing in all different direction with, with some actually pointing in opposite directions.