Before you drive off with your new rig, do your own PDI. Bring old clothes and crawl around under it with a light and inspect real close. Run the slides in and out, watch walls and floors for movement. Run the air and furnace. Fill all water tanks full and sit and observe for 1hour. And lastly never, never pay dealer for PDI. If the rig has a defect from the factory he gets paid to fix it, why should pay him any PDI I've never that figured out!