I am very thankful I found this post, so I wanted to add my experience with a similar situation to that of tracks_II with my 2013 C-Max SE with about 110,000 miles. A couple of days ago I was traveling down I-95 at about 70 mph on cruise control when the "Stop Safely Now" indication appeared. I was easily able to move to the shoulder, stop, and turn off the car. I checked under the hood to look at fluids and see if anything looked obviously wrong (I am a novice with cars). Everything looked normal, so I started up again and slowly moved down the shoulder at about 15 mph (on electric) with the plan to get to the nearest exit. Not long after, I noticed the hybrid battery charge going down, and then the "Stop Safely Now" indication came on again. Pressing on the gas pedal did nothing, so I obviously came to a stop and turned off the car. I turned it on one more time - this time it seems the gas engine kicked in right away but sounded and felt like it was struggling/puttering. After a few seconds, the "Stop Safely Now" indication returned and the engine stopped. I got it towed to a Ford Dealership that was luckily only about 15 minutes away. At the dealership, they tried to start the car again and the same thing happened with the struggling/puttering and stopping while it was parked. The dealership got to it the following morning and concluded it was the fuel pump. They read two DTCs: P0316 and P1A0C. Said they tested the pump and got no pressure on the gauge. They said that something similar had happened to a C-Max in the past and it took them 5 days to diagnose it. I am still waiting for the Motorcraft Sender and Pump Assembly to arrive from MI since no dealership in FL had one, so I will see if indeed it really is the issue. They quote 4 hours of labor, about $360 for the Pump and Sender emergency shipped, and $13 for a gasket. I will update after I pick up the car.