I have been looking into this rear mount hauler for some time now & couldn't believe the difference in how the reciever hitch is mounted on the backer of the 5er. The scary ones are bumper mounted only. The Excel is securely mounted to the frame just liike you would mount a class III or IV to your truck. To my surprise, the Excel has a threaded bolt on the side of the reciever to ensure a tight fit that doesn't allow movement once the insert goes in.

I would never haul on the back of the 5er if it only has the bumper mount. I purchased a rack that is suppoed to haul of to 500 lbs on it & modified it to Transport our scooter.
Thanks to Everyone for their help.