The contact owns a 2012 Chrysler 300. The contact stated that while driving at 65 MPH, the temperature gauge had independently increased levels. The contact managed to pull over to the shoulder of the road and was able to restart the vehicle as a temporary repair. The contact stated that while driving at an undisclosed speed, white smoke had leaked through the air vent into the interior cabin before independently shifting the gear into neutral. In addition, a fire had started from under the hood of the vehicle. No warning lights illuminated. The contact stated that a couple of nearby pedestrians attempted to extinguish the fire, but were unsuccessful due to the size of the fire. The contact had COPD, which was impacted during the failure, and medical attention was sought for a heart-related issue. The fire department arrived on the scene to extinguish the fire. A report was filed; however, it was unclear if either the local Fire department or Police department had filed the report. The vehicle was towed to a local tow lot, where it remained and was declared a total loss. The local dealer was contacted. The manufacturer was not made aware of the failure. The failure mileage was approximately 123,000.