The contact owns a 2007 Chrysler 300. The contact stated after exiting out of their vehicle from a drive, they smell an abnormal odor of plastic burning coming from the rear of the exterior of the vehicle. The contact inspected their vehicle and opened their rear trunk and noticed that the plastic covering of their fuse box in their trunk had melted with melt wiring coming from the fuse box to the battery. The contact stated there was no smoke or fire coming from the vehicle therefore nothing had to be extinguished. No fire department report was made. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 95,000.