Before your first ride with a trailer, you must dutifully check it out
✓ Check the trailer's tire pressure, topping up if necessary according to the manufacturer's recommendations on the tire.
✓ Check the correct tightening of the mounting bolts in the running wheels.
✓ Couple the trailer to the car according to the instructions.
✓ Apply the trailer parking brake (if it has one) and check for proper operation.
✓ Connect the electrical system to the tow vehicle and check for proper operation.
✓ Check the tightness of the plumbing system (if it has one).
✓ All wheel fasteners, overrun devices, axles and drawbar fasteners except for the M20x1.5 nut bolting the hub should be inspected and tightened if necessary.