2013 MERCEDES-BENZ S550 Engine Problems

I JUST HAD A VERY EXPENSIVE REPAIR DONE TO MY 2013 S550; REPLACING THE ENGINE HARNESS, ON A CAR THAT WAS LOOKED AFTER LIKE MY OWN CHILD! OIL CHANGES REGULARLY, SERVICE A AND SERVICE B AS SOON AS THE LIGHT WENT ON, ABSOLUTELY NO REASON WHY THIS SORT OF DAMAGE SHOULD HAVE HAPPENED ON A PERFECTLY WELL-MAINTAINED VEHICLE. A REPAIR THAT SET ME BACK $6,800.00 THAT I DID NOT HAVE AT THE TIME. THROUGH FRIENDS AND COLLEAGUES I WAS TOLD THAT I SHOULD REACH OUT TO MB USA REGIONAL REPRESENTATIVE AND ASK FOR ASSISTANCE. I WAS TOLD THAT THIS WAS POTENTIALLY A DESIGN FLAW. SADLY, THEY NO LONGER COME TO THE PHONE AND THE CUSTOMER SERVICE INDIVIDUAL I SPOKE TO DECIDED THAT SINCE I DO NOT HAVE AN EXTENDED WARRANTY WITH MB, THERE IS LITTLE THEY WILL DO FOR ME. PERHAPS IF THE MECHANICS AT FLETCHER JONES MERCEDES BENZ IN...