I used to own a 2010 Chrysler 300. It had dual fuel pumps. One each under each rear seat. That's right inside the car. You would access the fuel pumps by removing the rear seats. I overfilled one time and it ruptured a seal in one of the fuel pumps. Fuel leaked out and caused fumes in the car. Took a long while to get that fuel smell out of the car. Lesson learned.