Home · 2012 Mercedes-benz E-class Wagon · Complaints

What 233 owners told NHTSA about the 2012 Mercedes-benz E-class Wagon

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (233)Crash / fire / injury (9)Airbags (92)Fuel system (37)Electrical system (22)Brakes (21)Engine (20)Suspension (15)Steering (12)Transmission & drivetrain (10)Body & structure (8)Seats (7)

37 of 233 complaints match · Fuel system · clear filters · page 2 of 2

Aug 10, 2020Fuel system

MY VEHICLE IS EMITTING A VERY STRONG FUEL SMELL AND POSSIBLE LEAK COMING FROM THE FUEL PUMP. THIS IS LOCATED UNDER THE REAR SEAT, WHICH HAD A RECALL. I BELIEVE THAT THE ITEM IS FAULTY AND SHOULD REPLACED ONCE AGAIN. I REACHED OUT TO THE DEALERSHIP AND TO MB CORP; BUT THEY DO NOT WANT TO TAKE RESPONSIBILITY FOR THEIR FAULTY DESIGN AND PRODUCT. THE VEHICLE IS NOT SAFE TO DRIVE WITH THE STRONG VAPORS, WHICH ARE DANGEROUS TO HEALTH. ALSO, I AM FORCED TO LEAVE THE VEHICLE OUTSIDE OF THE GARAGE BECAUSE OF MY FEAR THAT THIS WILL CAUSE A FIRE OR EXPLOSION, RESULTING IN MASSIVE HOUSE DESTRUCTION AND POSSIBLE DEATH.

NHTSA ODI 11348441

Jul 10, 2020Fuel system

MERCEDES E350 2DR CABRIO WITH 50,000 MILES HAS STRONG FUEL ODOR ON DRIVERS SIDE. MERCEDES MECHANIC FOUND LEAK FROM LEFT SIDE OF FUEL TANK W/ FUEL COVER CRACKED AND LEAKING. WELL MAINTAINED, SINGLE OWNER CAR. MERCEDES HAS RECALLED EARLIER MODELS WITH SAME ISSUE BUT HAS NOT YET RECALLED THIS MODEL. DANGEROUS SAFETY ISSUE. STRONG FUEL ORDER SMELL INSIDE CAR COMPARTMENT AND WHILE OUTSIDE DIVERS SIDE. LIKELY FIRE RISK. NEEDS TO BE ADDRESSED ASAP.

NHTSA ODI 11338659

May 14, 2020Fuel system

GASOLINE SMELL IN CABIN AS WELL AS GARAGE WHEN REFUELING WITH VISIBLE GASOLINE ON TOP OF TANK. *TR

NHTSA ODI 11324526

Jan 11, 2020Fuel system

FUEL PUMP HOUSING (UNDER REAR SEAT,DRIVERS SIDE) CRACKED AND LEAKING FUEL. CAR FILLS WITH STRONG FUEL VAPORS WITH RAW FUEL COLLECTING ON TOP OF FUEL PUMP HOUSING. THIS WAS NOTICED WHILE DRIVING, PULLED REAR SEAT CUSION TO DISCOVER RAW FUEL INSIDE CAR.

NHTSA ODI 11298586

May 21, 2019Fuel system

SMELLED GAS FUMES AROUND SIDES OF VEHICLE. REPAIR FACILITY FOUND FUEL LEAK AROUND THE FUEL FILTER WITH SUBSEQUENT REPAIR.

NHTSA ODI 11208918

Nov 2, 2018Fuel system

FUEL SMELL WHILE CAR WAS PARKED IN GARAGE. CONDITION GOT WORSE OVER A FEW WEEKS UNTIL FUEL COULD BE SMELLED WHILE DRIVING. TOOK IN FOR REPAIR. FUEL FILTER WAS FOUND TO BE LEAKING ON DRIVERS SIDE.

NHTSA ODI 11145023

Oct 29, 2018Fuel system

STRONG FUEL SMELL WHEN PAKED (STATIONARY) IN THE GARAGE AT HOME AND NOW CAN ALSO SMELL WHILE DRIVING. CAR HAS 56700 MILES. THIS HAS BEEN GOING ON FOR A MONTH

NHTSA ODI 11143910

Oct 23, 2018Fuel system

TL* THE CONTACT OWNS A 2012 MERCEDES-BENZ E63. WHILE THE VEHICLE WAS PARKED OR WHILE DRIVING, A FUEL ODOR WAS PRESENT INSIDE AND OUTSIDE OF THE VEHICLE. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF CHANDLER (LOCATED AT 7450 W ORCHID LN, CHANDLER, AZ 85226, (480) 421-4500) WHERE IT WAS DIAGNOSED THAT A CRACK IN THE FUEL SENDING UNIT ON THE FUEL TANK AND THE SENDING UNIT ASSEMBLY NEEDED TO BE REPLACED. THE VEHICLE WAS IN THE PROCESS OF BEING REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND INFORMED THE CONTACT THAT THE VEHICLE WAS OUT OF WARRANTY. THE APPROXIMATE FAILURE MILEAGE WAS 120,000. THE VIN WAS NOT AVAILABLE.

NHTSA ODI 11142269

Jun 4, 2018Fuel System, OtherFuel system

TL* THE CONTACT OWNS A 2012 MERCEDES-BENZ E350. THE CONTACT NOTICED AN ABNORMAL FUEL ODOR INSIDE THE VEHICLE. THE VEHICLE WAS TAKEN TO PARK PLACE MOTORCARS MERCEDES-BENZ DALLAS (6113 LEMMON AVE, DALLAS, TX 75209, (214) 736-5753) WHERE IT WAS DIAGNOSED THAT THE FUEL FILTER WAS CRACKED AND NEEDED REPLACEMENT. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 90,000.

NHTSA ODI 11099821

Mar 11, 2018Fuel system

WHEN PUSHING GAS PEDAL TO THE FLOOR TO PULL OUT IN TRAFFIC THE CAR WENT INTO LIMP MODE AND WOULD NOT ACCELERATE. TOOK TO DEALER AND ERROR CODE IS GAS PEDAL SENSOR. DEALER SAID IT IS AN ISSUE WITH THE ECU WIRE HARNESS. THIS IS A KNOWN ISSUE. I COULD HAVE BEEN KILLED. HAS HAPPENED 3 TIMES NOW AND DEALER HAS BEEN UNABLE TO FIX IT.

NHTSA ODI 11078524

Sep 6, 2017Fuel system

TL* THE CONTACT OWNS A 2012 MERCEDES-BENZ E350. THE CONTACT STATED THAT HE NOTICED A STRONG FUEL ODOR THROUGHOUT THE VEHICLE. THE CONTACT CALLED MERCEDES-BENZ OF ARROWHEAD LOCATED AT 9260 W BELL RD, PEORIA, AZ 85382 WHERE AN APPOINTMENT WAS SCHEDULED AND THE CONTACT STATED THAT THE DEALER GAVE A VERBAL DIAGNOSES BUT THE VEHICLE WAS NOT PHYSICALLY DIAGNOSED OR REPAIRED. THE CONTACT REFERENCED NHTSA CAMPAIGN NUMBER: 12V557000 (FUEL SYSTEM, GASOLINE). THE CONTACT STATED THAT HE WAS CONCERNED DUE TO THE STATE HE RESIDES, THAT THE FAILURE COULD CAUSE A FIRE. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 69,700.

NHTSA ODI 11021747

Jun 15, 2017AirbagsFuel system

TAKATA RECALL: DEALERS INDICATE THEY DO NOT HAVE PARTS. I WANT TO SELL MY CAR BUT CAN NOT.

NHTSA ODI 10995440

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Working with the data? Download all 233 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2012 Mercedes-benz E-class Wagon verdict →