I am responding to this thread because I am towing a 2018 Ford Fusion Hybrid, which is very similar to the vehicle noted in the thread. I am also using the Blue Ox tow system. My experience is a bit different but wanted to pass on a couple of things, for what its worth.
The vehicles in question both have a built in "Neutral" towing capability. The instructions for use are quite specific and the function does work well in the "Neutral" mode. I didn't see anything in prior messages regarding the presence of the blinking "Neutral" light in the center of the shift button. If that light is not slowly and continually blinking, the "Neutral" function is not engaged. This is critical. When I am towing, I stop about every 2 hours to make sure it is still "Neutral" engaged, even though I have been told there could still be severe transmission damage in that timeframe because of a lack of lubrication.
I have towed my Fusion over 6,000 miles and have had one incident I will share with you, that could have been catastrophic if it happened at road speeds. I was in a cloverleaf transition from one freeway to another, at a speed of about 22 MPH. I began to feel a violent side to side shaking from the rear of the coach. I instantly looked at my camera and saw the Fusion "whipsawing" wildly behind me, even at this very low speed. I was able to pull off the road and the whipsawing stopped. I immediately thought I had a flat tire, which was not the case. I checked the hitch, tow bar and the base plate and saw nothing unusual. I immediately called Blue Ox and related the incident to them. They said they had no reports of any kind on Ford Fusions but they were aware of a similar unexplained incident with a Jeep product.
After the above incident, I towed the vehicle a very short distance with no problem and immediately took it to a local dealer to have the entire system checked. Everything checked out OK. Since that incident, there has been no recurrence.
I have wondered if this lone incident was a "perfect storm" situation, caused by the combined geometry of the roadway, the towbar and the Fusion's turning wheels on the toad. Hopefully, I will never know.
I had a discussion with the tech person at Blue Ox about the height of the towbars, between the coach hitch and the fusion's connections to the towbar. There is about a 3 1/2" drop from my coach to the Fusion which, Blue Ox said, was too much. They said that the best situation is to have the tow bar "flat" between the vehicles, which doesn't seem to match with prior comments on this thread and that's something I want to check further with Blue Ox.
On another note, I installed an Air Force One braking system and had it installed at the same time as the Blue Ox system was on the Fusion. The installer is a long-time reputable dealer. On my first trip after the install, I stopped for my self- imposed 2 hour vehicle check and found that the brakes on the Fusion had been destroyed---the rotors, pads and calipers were completely gone. I disconnected the hose to the AF One system and towed it to the nearest Ford dealer, where all 4 brakes and, even the fluid, were replaced. The vehicle had 300 miles on it at the time. I decided not to reconnect the braking system until it could be checked out by another installer and we soon found that a valve connection on the motorhome had been installed backwards by the installer and was putting constant pressure on the brakes, even when the brakes weren't applied.
So, even though the dealer claimed to have installed "many" of these systems, and said that they had tested the system, it seems they didn't tell the truth. So, it's buyer beware. Make sure these sophisticated systems are properly tested---and retested---before you ride off into the sunset.