ON AUGUST 1ST 2017 BOUGHT BRAND NEW BATTERY FROM MERCEDES-BENZ OF EASTON. INSTALLED IN NEXT COUPLE OF WEEKS WITHOUT ANY ISSUE. ON SEPT 12TH 2017 AROUND 2.45PM STARTED THE CAR(IN THE DRIVEWAY) AND WENT INSIDE TO GET MY MOBILE. WHEN I CAME OUT TO TE CAR, SAW BIG SMOKE INSIDE AND IMMEDIATELY SWITCHED OFF THE ENGINE. SAW FLAMES COMING UNDERNEATH OF PASSENGER SEAT AND IMMEDIATELY POURED WATER. LATER OBSERVED BATTERY IGNITED THE FLAMES AND EVEN TOP OF THE BATTERY STARTED MELTING. CALLED MBUSA AND REPORTED THE INCIDENT, AND WAS PROMISED THAT A SUPERVISOR WILL CALL BACK. WAITING TO HEAR BACK FROM MBUSA. IT WAS SO SCARY, AND I CAN'T EVEN IMAGINE WHAT IF THIS HAPPENED ON FREEWAY.