Home · 2011 Mercedes-benz C-class Hybrid · Complaints

What 516 owners told NHTSA about the 2011 Mercedes-benz C-class Hybrid

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 (516)Crash / fire / injury (25)Airbags (269)Suspension (62)Fuel system (51)Body & structure (50)Electrical system (46)Steering (35)Lights (21)Brakes (13)Engine (11)Transmission & drivetrain (10)

51 of 516 complaints match · Fuel system · clear filters · page 2 of 3

Jun 29, 2020Fuel system

MY ENGINE LIGHT JEEP COMING ON WITH A P0456 CODE. REPLACE GAS CAP AND PURGE VALVE CONTROL LESS THEN YEAR AGO. HOWEVER I STILL SMELL GAS WHEN I FILL UP TANK. AFTER IT GOES DOWN TO 3/4 TANK I DON'T SMELL GAS. WHEN IT DROP BELOW HALF TANK THE ENGINE LIGHT COMES ON. SAME THING AS LAST YEAR NOW IT STARTING AGAIN IN JUNE 2020. ONLY HAVE 76000 MILES. DONT DRIVE THANK MUCH. GET SERVICE EVERY YEAR. THEY HAD RECALL FOR E350 BACK IN 2013 HOWEVER MB KEEP TELL ME ITS NOT MY VIN. I THINK THERE IS PROGRAM WITH THE C350 FOR 2011 MODEL TOO. THE LIGHT ALWAYS COME IN WHEN IM DRIVING DOES MATTER IF CITY STREET OR FREEWAY. FIRST TIME 2019. REPAIRS IN JULY. HAPPEN ON 6/3/2020. WAS CLEAR THEN WHEN GASS WENT TO HALF TANK ON 6/28/2020 IT HAPPEN AGAIN.

NHTSA ODI 11331485

May 11, 2020Fuel system

TL* THE CONTACT OWNS A 2011 MERCEDES-BENZ C300. THE CONTACT STATED THAT AFTER REFUELING HIS VEHICLE, THERE WAS AN ABNORMAL FUEL ODOR THROUGHOUT THE VEHICLE. THE CONTACT ALSO STATED THAT THE CHECK ENGINE LIGHT FLASHED INTERMITTENTLY WHILE DRIVING AT VARIOUS SPEEDS. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF JACKSON (455 STEED RD, RIDGELAND, MS 39157) WHERE THE MECHANIC DISCOVERED A CRACK IN THE FUEL LINE THAT NEEDED TO BE REPLACED. THE CONTACT WAS INFORMED THAT THERE WERE NO RECALLS ON HIS VEHICLE. THE VEHICLE WAS THEN TAKEN TO AN INDEPENDENT MECHANIC WHO ASSOCIATED NHTSA CAMPAIGN NUMBER: 12V557000 (FUEL SYSTEM, GASOLINE) WITH HIS FAILURE HOWEVER, HIS VIN WAS NOT INCLUDED IN THE RECALL. THE CONTACT ATTEMPTED TO REACH THE MANUFACTURER BUT WAS UNSUCCESSFUL. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 87,000.

NHTSA ODI 11324172

Apr 22, 2020Fuel system

MY 2011 C300 SMELLS LIKE GASOLINE INSIDE AND OUTSIDE AFTER I FILL THE TANK. THE SMELL SUBSIDES AFTER THE GAS TANK REACHES ABOUT HALF TANK MARK. DURING MY RESEARCH I CAME ACROSS A FUEL SYSTEM RECALL: NHTSA CAMPAIGN ID NUMBER: 12V557000 / MANUFACTURER CAMPAIGN NUMBER: 2013010004. MY 2011 C300 IS ONE OF THE VEHICLES LISTED. I CONTACTED MERCEDES BENZ CUSTOMER CARE AT 800-367-6372; CUSTOMER CARE STATED THAT THE VIN WAS NOT INCLUDED IN A RECALL. THE CURRENT MILEAGE IS 78,381

NHTSA ODI 11321947

Mar 29, 2020Fuel system

STRONG FUEL ODOR INSIDE CABIN AND AROUND VEHICLE AFTER FUELING. ISSUE STARTED OVER LAST COUPLE OF MONTHS AND ONLY WHEN FUELED TO CLOSE TO FULL.

NHTSA ODI 11319643

Mar 1, 2020Fuel system

VEHICLE CONTINUOUSLY EMITTING GAS VAPORS INSIDE VEHICLE AND LEAKING GAS INSIDE BEHIND AND/OR UNDERNEATH BACK DRIVER SIDE SEAT. VIN (XXXX) REDACTED TO PROTECT PERSONALLY IDENTIFIABLE INFORMATION PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11315485

Feb 18, 2020Fuel system

TL* THE CONTACT OWNS A 2011 MERCEDES BENZ C300. THE CONTACT STATED THAT THERE WAS A STRONG ODOR OF FUEL AROUND THE VEHICLE WHILE THE VEHICLE WAS PARKED IN THE GARAGE. THE CONTACT NOTICED FUEL ON THE GROUND WHEN THE VEHICLE WAS MOVED OUT OF THE GARAGE. THE VEHICLE WAS NOT TAKEN TO A DEALER OR AN INDEPENDENT MECHANIC FOR A DIAGNOSTIC TESTING. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 80,000. THE VIN WAS NOT AVAILABLE.

NHTSA ODI 11309934

Jan 27, 2020Fuel system

I BEGAN SMELLING GAS IN THE CAB OF THE VEHICLE. AFTER REFUELING, THE VEHICLE WAS LEAKING GAS FROM THE RIGHT SIDE IN THE DRIVEWAY OF MY RESIDENCE AND THE ODOR OF GAS IN THE CAB BEGAN TO INCREASE. MERECEDES PERSONNEL REFUSED TO ACKNOWLEDGE OTHER ISSUES AND WANTED TO BEGIN AT THEIR STARTING POINTS REGARDING REPAIRS. WHEN THIS RECALL WAS ADDRESSED, I WAS INFORMED IT DID NOT APPLY TO MY VEHICLE. AFTER A LENGTHY ELIMINATION PROCESS, WE LEARNED THE FUEL PUMP FLANGE HAD FAILED IN THIS MODEL AS IT HAS IN OTHER SIMILAR MODELS. MERECEDES AT THIS POINT REFUSED TO EXTEND A WARRANTY CONSIDERATION SO I SOUGHT OUT AN INDEPENDENT MECHANIC TO REPAIR IT. NOW MERCEDES IS REFUSING TO REIMBURSE THE COST OF THE REPAIRS.

NHTSA ODI 11302292

Jan 6, 2020Fuel system

WHEN I FILL UP THE CAR WITH GAS, MY CAR SMELLS LIKE GAS INSIDE AND OUT UNTIL IT REACHES ABOUT A HALF A TANK. THIS IS VERY DANGEROUS AND I'VE READ THAT SEVERAL OTHER MERCEDES ARE HAVING THE SAME ISSUE. I'VE CONTACT MERCEDES BUT THEY SAY IT'S NOT ON A RECALL LIST.

NHTSA ODI 11297396

Dec 15, 2019Fuel system

I HAVE SCENTED A STRONG, AND WORSENING, ODOR OF GASOLINE IN VEHICLE FOR QUITE A WHILE. I REMOVED BACK SEAT AND FUEL TANK ACCESS PANELS AND INSPECTED THE FUEL PUMPS. DRIVERS SIDE HAD RAW GASOLINE POOLED ON 2124703294 FUEL FILTER ASSEMBLY. I CLEANED THE FUEL UP AND DROVE THE CAR WITH 1/4 TANK OF FUEL AND CHECKED AND FOUND FRESH FUEL LEAKING. I CLEANED AND LOOKED CLOSELY AND FOUND THE SOURCE OF THE LEAK (IT WAS STILL OOZING OUT AFTER VEHICLE WAS PARKED FOR SOME TIME.) THE LITTLE PIPE THAT THE FUEL PRESSURE SENSOR ON NON-AMG VEHICLES PLUGS INTO HAS A HOLE IN IT. I HAVE ATTACHED PICTURES OF THIS SAFETY HAZARD. *TR

NHTSA ODI 11289204

Oct 17, 2019Fuel system

TL* THE CONTACT OWNS A 2011 MERCEDES-BENZ C300. THE CONTACT STATED THAT THE VEHICLE EMITTED A FUEL ODOR. THE CONTACT TOOK THE VEHICLE TO MERCEDES-BENZ OF ONTARIO (LOCATED AT 3787 E GUASTI RD, ONTARIO, CA 91761, 909-212-8400) WHO INSPECTED THE VEHICLE AND NOTICED THAT THE FUEL FILTER WAS FRACTURED AND CAUSED FUEL TO LEAK UNDERNEATH THE REAR SEATS. THE CONTACT STATED THAT THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 12V557000 (FUEL SYSTEM, GASOLINE). THE FUEL FILTER FLANGES WERE REPLACED. THE CONTACT CALLED THE MANUFACTURER, BUT WAS UNABLE TO SPEAK WITH AN AGENT. THE APPROXIMATE FAILURE MILEAGE WAS 130,000.

NHTSA ODI 11269228

Aug 5, 2019Fuel system

TL* THE CONTACT OWNS A 2011 MERCEDES-BENZ C300. EVERY TIME THE VEHICLE WAS FILLED WITH FUEL, A STRONG FUEL ODOR ENTERED THE VEHICLE. THE CONTACT INFORMED MERCEDES-BENZ OF HOUSTON NORTH (17510 NORTH FWY, HOUSTON, TX 77090, (281) 305-8970) OF THE FAILURE. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 102,000.

NHTSA ODI 11241694

Jun 26, 2019Fuel system

CAR LEAKS GASOLINE WHEN ABOVE 3/4 OF TANK IN THE RIGHT REAR AREA BY THE FUEL FILLER LINE. SMELL GAS AND SEE GAS LEAKING.

NHTSA ODI 11222816

Feb 7, 2019Fuel system

I HAD A FUEL PUMP FLANGE CRACK AND LEAK FUEL WHEN TANK WAS FILLED. ALSO, THE CHECK ENGINE LIGHT THREW CODES RELATING TO SMALL LEAKS IN THE SYSTEM AND AS SUCH WOULDN'T PASS STATE INSPECTION. I HAD TO GET THESE FIXED -- BASICALLY BOTH SIDES (FUEL PUMP/FILTER/SENDING UNIT) AT THE COST OF ALMOST $1,000 AT A LOCAL SHOP. ALL VIN SEARCHES DIDN'T SHOW THAT MY CAR WAS UNDER RECALL FOR THE FUEL SYSTEM, HOWEVER I NOTICED THAT MANY OTHER MODELS IN YEAR 2011-2012 WERE UNDER RECALL: SEE NHTSA CAMPAIGN ID #12V557000. I BELIEVE THIS MODEL SHOULD BE INCLUDED IN THIS RECALL.

NHTSA ODI 11174993

Dec 21, 2018Fuel system

FUEL LEEK UNDER SEAT PASSENGER SIDE AS WELL STRONG SMELL COMING FROM EVERYWHERE WHEN THE GAS THANK IS FILLED AT THE GAS STATION.I CALLED THE MBUSA FOR HELP WITH THIS PROBLEM AND THEY REFOCUSED TO HELP .THIS IS BEEN UNGOING PROBLEM WITH THE MERCEDES AS I HAD SAME PROBLEM WITH MY 2007 S550 AS WELL MY 2007 E350 .THIS TIME I'M EXTREMELY SCARED ,IF THIS PROBLEM THAT I HAVE WITH MY CAR IT'S GOING TO CAUSE THE HEALTH DAMAGE TO ME AND MY FAMILY , AND EVERY TIME I OPEN MY GARAGE DOOR IN THE MORNING I'M AFRAID THE ELECTRICAL LIGHT OR MOTOR WOULD SPARK AND IGNITE THE FUMES AND CAUSE THE MAJOR EXPLOSION IN MY HOUSE/ GARAGE.PLEASE I NEED HELP FIXING MY CAR AND THOUSANDS OTHER AMERICANS WITH THE SAME PROBLEM.THANK YOU

NHTSA ODI 11162877

Dec 7, 2018Fuel system

TAKATA RECALL HAD VEHICLE CHECKED AFTER CONSISTENT SMELL OF FUEL UPON FILLING UP THE CAR. MECHANIC DISCOVERED THE FUEL FILLER NECK TO BE FAULTY BECAUSE OF PLASTIC CONNECTOR FUEL TANK.

NHTSA ODI 11156827

Nov 25, 2018Fuel system

STRONG FUEL ODOR EVERY TIME FILLED UP THE GAS TANK (FULL TANK)

NHTSA ODI 11153619

Nov 9, 2018Fuel system

WHEN FUEL TANK IS ABOUT 75%-100% FULL, THE CAR WILL SMELL HEAVILY OF GASOLINE INSIDE AND AROUND THE REAR OF THE VEHICLE. UPON INSPECTION, FUEL PUMP COVER/CAP SEEMS TO BE CRACKED AND LEAKING FUEL. ENGINE CODE P0456.

NHTSA ODI 11150330

Aug 28, 2018Fuel system

GAS LEAK .. CAUSING CAR TOO SMELL LIKE GAS WHEN YOU FILL UP

NHTSA ODI 11122961

Jan 3, 2018Fuel system

TL* THE CONTACT OWNS A 2011 MERCEDES-BENZ C300. THE CONTACT STATED THAT THE VEHICLE EXPERIENCED A COMPLETE LOSS OF POWER. UPON INSPECTION, THE CONTACT FOUND THAT THE VEHICLE RETAINED EXCESSIVE WATER. THE VEHICLE WAS TAKEN TO BENZEL-BUNCH MOTOR CAR (28 GRAND AVE, ENGLEWOOD, NJ) WHERE IT WAS DIAGNOSED THAT THE VEHICLE'S DRAINS WERE CLOGGED AND THEY WOULD NEED TO PERFORM A FLUSH TO REMOVE THE WATER AND REWIRE THE VEHICLE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VIN WAS UNKNOWN. THE FAILURE MILEAGE WAS APPROXIMATELY 79,000.

NHTSA ODI 11058341

Nov 30, 2017Fuel system

TL* THE CONTACT OWNS A 2011 MERCEDES-BENZ C300. WHEN THE FUEL TANK WAS FULL, THERE WAS A STRONG FUEL ODOR INSIDE THE VEHICLE ON THE REAR PASSENGER SIDE. THE FAILURE OCCURRED WHILE DRIVING VARIOUS SPEEDS. WHILE THE VEHICLE WAS PARKED, THE ODOR WAS VERY STRONG INSIDE AND OUTSIDE THE VEHICLE. THE CONTACT HAD TO ROLL DOWN THE WINDOWS FOR THE FUEL ODOR TO SUBSIDE. THE FAILURE OCCURRED WITHOUT WARNING. WHEN THE FUEL TANK WAS HALF FULL, THERE WAS NO FUEL ODOR IN THE VEHICLE. THE VEHICLE WAS NOT TAKEN TO THE DEALER. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS CONTACTED AT 800-367-6372 AND STATED THAT THE VIN WAS NOT INCLUDED IN A RECALL; THEREFORE, THE CONTACT HAD TO PAY FOR THE REPAIR. A CASE NUMBER WAS NOT PROVIDED. THE APPROXIMATE FAILURE MILEAGE WAS 64,000.

NHTSA ODI 11051544

Oct 2, 2017Fuel system

THERE APPEARS TO BE IS A CRACK ON THE FUEL FILTER. THIS CRACK HAS RESULTED IN A FUEL LEAK, INCREASING THE RISK OF A FIRE. THE TOP OF THE FUEL SENDING UNITS ARE LEAKING. HIGH FUMES ODOR INSIDE AND OUT OF THE VEHICLE BOTH WHEN IT IS STATIONARY AND IN MOTION REGARDLESS IF IT'S ON THE HIGHWAY, TURNING OR CITY STREET.

NHTSA ODI 11030861

Jun 16, 2017Fuel system

TL* THE CONTACT OWNS A 2011 MERCEDES-BENZ C300. THE CONTACT STATED THAT A STRONG FUEL ODOR WAS PRESENT INSIDE THE CABIN OF THE VEHICLE. WHEN FUELING THE VEHICLE, STRONG FUEL VAPORS LEAKED FROM THE VEHICLE. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS CALLED AND INFORMED THE CONTACT THAT THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 12V557000 (FUEL SYSTEM). THE FAILURE MILEAGE WAS APPROXIMATELY 127,000.

NHTSA ODI 10995556

May 22, 2017Fuel system

ABOUT 5 MONTHS AGO I SMELLED A STRONG ODOR OF GAS FUMES OMITTING FROM MY CAR WHILE I WAS DRIVING ON THE FREEWAY. I LIVE IN SOUTHERN CALIFORNIA WHERE THE WEATHER GETS EXTREMELY HOT. I BROUGHT MY CAR IN TO GET CHECKED OUT AT A LOCAL MECHANIC SHOP ON 12/23/2016 AND IT TURNS OUT THAT THE FUEL TANK WAS CRACKED AND LEAKING FUEL. I LOOKED ON THE NHTSA DATABASE AND FOUND A RECALL REPORTED ON 12/03/2012 REGARDING A FUEL FILTER LEAK AS MENTIONED BELOW. NHTSA CAMPAIGN NUMBER: 12V557000 MANUFACTURER MERCEDES-BENZ USA, LLC. COMPONENTS FUEL SYSTEM, GASOLINE SUMMARY MERCEDES-BENZ IS RECALLING CERTAIN MODEL YEAR 2011-2012 S400, S550, S550 4MATIC, S63 AMG, C300, C300 4MATIC, E350, GLK350, GLK350 4MATIC, CL550 4MATIC, AND CL63 AMG VEHICLES I MANUFACTURED FROM APRIL 18, 2011, THROUGH JULY 12, 2011. DUE TO AN IRREGULARITY STEMMING FROM THE MOLDING PROCESS OF THE FUEL FILTER FLANGE, THE FUEL FILTER FLANGE MAY CRACK WHEN OPERATED IN HIGH TEMPERATURES. ALTHOUGH THE RECALL WAS SPECIFICALLY FOR MERCEDES BENZ C300 MANUFACTURED IN 2011, I BELIEVED IT SHOULD ALSO EXTEND TO THE PREVIOUS YEAR; 2010. IM REPORTING THIS TO SEE IF ANY OTHER CARS HAD THE SAME EXACT ISSUE AS WHAT WAS DESCRIBED ABOVE. I BELIEVE THIS IS A DEFINITE FIRE RISK ESPECIALLY TO THOSE LIVING IN VERY HOT LOCATIONS SUCH AS SOUTHERN CALIFORNIA. I WOULD LIKE TO KNOW IF THE RECALL COVERS MY CAR AND IF SO I WOULD LIKE TO GET REIMBURSED FOR THE SERVICES I PAID TO THE MECHANIC SHOP. THANK YOU.

NHTSA ODI 10990845

May 9, 2017Fuel system

I HAD TO PAY FOR A FUEL FILTER LEAK DUE TO A CRACK OF THE FUEL FILTER FLANGE AND WAS TOLD THIS WAS NOT A RECALL ON MY VEHICLE, BUT WHEN I WAS LOOKING AT RECALLS FOR MY YEAR AND MODEL I CAME ACROSS NHTSA CAMPAIGN NUMBER-12V557000 WITH A RECALL ON MERCEDED-BENZ C300 4 MATIC MODEL YEAR 2011-2012 FOR FUEL LEAK DUE TO CRACKED FLANGE. I ASKED THE DEALERSHIP ABOUT IT EVEN THOUGH THAT IS EXACTLY WHAT HAD TO BE REPLACED AND SAID IT DID NOT AFFECT MY VEHICLE, I CALLED MERCEDES BENZ AT THE NUMBER PROVIDED IN THE REMEDY SECTION OF THE ANNOUNCEMENT AND WAS TOLD IT WAS NOT MY VEHICLE, PLEASE ADVISE WHAT I SHOULD DO NEXT, THANK YOU

NHTSA ODI 10984538

Oct 17, 2016Fuel system

I WAS DRIVING AND A STRONG FUEL ODOR WAS EXPERIENCED. WHEN I STOPPED THE CAR AND LOOKED UNDER THE UNDERCARRIAGE THERE WAS A PUDDLE OF FUEL. THERE IS A FUEL LEAK COMING FROM THE BOTTOM PLASTIC UNDERNEATH THE GAS TANK. IT MAY BE THE FUEL FILTER AS THE SAME YEAR AND MODEL HAD A RECALL BUT APPARENTLY MY VEHICLE WAS NOT COVERED. *TR

NHTSA ODI 10916581

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Working with the data? Download all 516 complaints as CSV · fetched from NHTSA July 25, 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 2011 Mercedes-benz C-class Hybrid verdict →