Manifold/header/muffler/tail Pipe problems of the 2014 Ford Fusion

Drove my 2014 Fusion with approx 141,800 miles on it to work (approx 30 miles) the night of 8/25/2020 with no issues or warning lights upon parking in the parking garage and exiting the vehicle. When I came out the next morning it failed to start with the remote. When I got in and tried to start it, it still would not start and it provided no warning lights. Had someone attempt to jump it which obviously didn't work, so was it towed to a nearby Ford service center. The summary of their diagnostics was as follows: there was no coolant (which I had put some in about 3 weeks prior, after the car did provide a warning that it was overheating. I had presumed that the Ford quick lane forgot to check my coolant levels when it was there 5/13/20 and at this time it was low but not empty), spark plug number 2 had coolant on it, cylinder #2 also had coolant in it, and after cleaning all spark plugs and reinstalling them white smoke was coming from the tail pipe which smelled like coolant. It was requested that I replace the battery and get a new engine at which they gave me a quote of $6526. 86. After doing research and asking a non-Ford mechanic, he agreed it was a Ford defect. Ford was notified via phone and a case number was provided, but said they could not help with this matter. This is the same issue the 1. 6l and 2. 0l had that was recalled and Ford acknowledges the issue with the 1. 5l in ssm 48106. Really sucks because the car runs great other than this issue and is currently parked while making a decision to fix or sell. Note: all routine maintenance work on this vehicle has been done by Ford.

I was driving down the road it begin to spudder and had hard time going. White smoke was coming from tail pipe and when I pulled over and popped the hood there was so much smoke coming from the engine where you put oil in. I was afraid it was fixing to catch on fire. Even had someone pull up because he thought it was on fire. My car will not start now.