I recommend using a Curt Echo Wireless Brake Controller # C51180 as it requires no wiring inside the cab. You plug it in between your 7-way and the trailer 7-way and control the brakes from your phone. If the phone isn't with the vehicle it will revert to the last loaded setting. It is a proportional brake controller so it will adjust automatically for light or severe braking. And it can be used with multiple vehicles and trailers as you can save 5 different configurations for easy use.... view full answer...
Adding a 5th wheel hitch to your 2012 Mitsubishi Fuso fe125 will require a custom installation. I recommend the Reese Low-Profile 5th Wheel Trailer Hitch - Dual Jaw - 30,000 lbs # RP30054 that will have 4 holes in the side brackets to your flat bed. The center to center mounting holes are 15 inches apart front to back and side to side are 25 inches. You may need to reinforce these areas to make them strong enough for the towing capacity of this hitch which may include adding a brace... view full answer...
Go To Results