2010 Mercedes Benz Gl

THIS IS A DIESEL-ENGINE 2010 MERCEDES GL350 PURCHASED IN AUGUST 2010 (8 MONTHS AGO). IT IS CURRENTLY INOPERABLE AND THE DEALER IS CITING COMPLETE FUEL SYSTEM CORROSION DUE TO WATER IN THE FUEL SYSTEM. THE FIRST INDICATION OF A PROBLEM WAS A CHECK-ENGINE LIGHT AND THE VEHICLE GOING TO "LIMP MODE" (WHERE THE COMPUTER KEEPS THE CAR AT 20 MILES PER HOUR WITH LOW POWER - A DANGER ON THE HIGHWAY AND ON HILLS). FORTUNATELY THERE WAS NO ACCIDENT OR INJURY DUE TO THE ONSET OF LIMP-MODE. BUT THE ESTIMATE FOR REPAIR IS $15,492.03 AND WARRANTY IS BEING DENIED BY THE MANUFACTURER. THERE WAS NO INDICATION OF THE ISSUE OF WATER IN THE FUEL PRIOR TO THE COMPLETE CORRUPTION OF THE FUEL SYSTEM AND THEREFORE NO OPPORTUNITY TO TAKE ANY POTENTIAL CORRECTIVE ACTION TO MINIMIZE DAMAGE. ALL DIESEL USED IN THE VEHICLE WAS PURCHASED AT VARIOUS RETAIL LOCATIONS IN CALIFORNIA. THUS FAR NO DETAIL HAS BEEN GIVEN AS TO HOW MUCH WATER WAS IN THE FUEL, HOW LONG THIS CORROSION PROCESS MIGHT HAVE TAKEN, OR WHETHER THERE WERE ANY MALFUNCTIONS IN ANY PART OF THE SYSTEM (E.G., FUEL AND WATER FILTERS AND/OR WARNING NOTIFICATIONS) THAT LED TO THIS EXTREME OUTCOME. GIVEN THE EXTREME EXPENSE OF THE PROBLEM, AND THE MANY QUESTIONS STILL REMAINING AS TO THE CAUSE, WE THOUGHT IT IMPORTANT TO BRING THIS TO THE ATTENTION OF THE NHTSA.