What 584 owners told NHTSA about the 2012 Mercedes-benz C-class Coupe

Vehicle: 2012 Mercedes-Benz C300 4Matic Sport Problem Component: Fuel / Propulsion System Safety Issue Description: My 2012 Mercedes-Benz C300 developed a serious fuel tank leak at approximately 106,460 miles which created overwhelming gasoline fumes and rendered the vehicle unsafe to operate. The gasoline fumes were extremely strong and entered the passenger area. The fumes were severe enough that I became physically overwhelmed from the gasoline exposure and discarded clothing due to gasoline contamination and odor. A local repair facility identified the leaking fuel tank. I was informed the replacement fuel tank was allegedly on extended backorder through Mercedes-Benz channels. Because the vehicle was unsafe to drive and replacement parts were allegedly unavailable for several months, I was forced to tow the vehicle from [XXX] to [XXX] at my own expense in order to locate a repair facility that could obtain a replacement fuel tank and safely repair the vehicle. The repair invoice states: “Installed used lt fuel tank incl switchover fuel pumps replace section of steel fuel line front of tank from lower braided line.” I am submitting this complaint due to: serious gasoline leak safety concerns, severe gasoline fume exposure, potential fire hazard, and the alleged extended unavailability of replacement fuel tanks. Mercedes-Benz USA Case Number: 22302114 INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11738871

The contact owns a 2012 Mercedes-Benz C300. The contact stated the fuel tank was emitting a fuel odor. The contact stated that the fuel odor was extremely strong and could be smelled inside the residence while the vehicle was parked in the garage. There were no warning lights illuminated. The vehicle was taken to a Certified Mechanic, who diagnosed that the leak was coming from the top of the fuel tank; however, the mechanic was unable to specify the cause. The vehicle was towed to the dealer, but the vehicle was not diagnosed. The vehicle was not repaired. The contact became aware of NHTSA Campaign Number: 12V557000 ( Fuel System, Gasoline) online; however, the VIN was not included. The manufacturer was informed of the failure and informed the contact that the VIN was not under recall. The failure mileage was approximately 98,000.

NHTSA ODI 11696118

The contact owns a 2012 Mercedes-Benz. The contact stated while driving at an undisclosed speed, the Check Engine and High Pressure Fuel Pump warning lights was illuminated. The failure occurred on several different occasions. The vehicle was taken back to the residence. The contact did research and was made aware of an unknown NHTSA Campaign Number however, the VIN was not included. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown. 

NHTSA ODI 11652861

The contact owns a 2012 Mercedes-Benz C350. The contact stated while the vehicle was parked, the contact noticed a strong smell of fuel around the exterior of the vehicle. In addition, the contact stated that while driving the vehicle, the fuel odor was extremely strong, and the contact could not wind the windows down. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was made aware of the failure. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was 53,000.

NHTSA ODI 11617546

During hard acceleration the high-pressure fuel pump fails. I've never had to replace this part on any other car that I have owned. When I research the part for this car, I reviewed many forums and articles complaining about the failure of the high-pressure fuel pump on the Mercedes c250 sport or similar chassis. The vehicle performs normally until there is hard acceleration; then the engine light comes on. This causes the car to lose acceleration power and slows the car down significant and can be dangerous especially if driving on a freeway or highway. The failure of the part has been reported to occur as early as 30k miles.

NHTSA ODI 11600868

While trying to pass big rig on freeway my car went into lymph mode and stalled causing the car behind me to brake and almost caused an accident. My engine light came on & after getting it checked out I retrieve the following code P0002. After doing some research it appears this is an ongoing issue with this year and model of car.

NHTSA ODI 11534939

The contact owns a 2012 Mercedes-Benz C300. The contact stated while driving at various speeds, extra brake travel time was needed to stop the vehicle. There was no warning light illuminated. The contact had taken the vehicle to an independent mechanic where the vehicle was purchased, and he was informed that the failure was caused by the new brake pads placed on the vehicle. The contact eventually took the vehicle to a dealer and was informed that the fuel tank and brake lines were corroded; and the contact was provided an estimate for the repair. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 96,000.

NHTSA ODI 11518035

The contact owns a 2012 Mercedes-Benz C300. The contact stated that while parked, the vehicle failed to start. The vehicle was towed to the dealer where it was diagnosed as having water intrusion. The vehicle was not repaired. The contact referenced the failure to NHTSA Campaign Number: 22V955000 (Fuel System, Gasoline, Fuel System, Diesel). The manufacturer was made aware of the failure. The failure mileage was approximately 109,000.

NHTSA ODI 11502765

Car is leaking gas very dangers . I contact Mercedes dealer regarding the recall on this type of Mercedes i have and they said only vehicles manufactured from April 18, 2011, through July 12, 2011. Mine was before or after , and they refuse to give me the exactly date for my car manufacturer. Car I use for Uber , and i don’t have any other income . If someone just through away a cigarette in parking lot might cause a big problem in the building and others cars in parking

NHTSA ODI 11490508

My Mercedes 2012 C 300 is leaking gas which may lead to fire ( the fuel filter flange when operated in high temperatures

NHTSA ODI 11488867

My car smell like a gas leak. I had went to a car shop to have the car to looked at. The mechanic had told me that the fuel filter flange is leaking gas.

NHTSA ODI 11474194

2012 C250 has a known defect with high pressure fuel pump. I personally have had an intermittent issue where vehicle will unpredictably stop working under heavy throttle and enter limp mode as the computer throws a fault code. This results in loss of power after the code making vehicle unpredictable and dangerous in passing situations. It leaves you stranded in the passing lane with oncoming traffic with a vehicle that will not accelerate. I have submitted a request multiple times with Mercedes benz corporate who has declined my submission. This issue has been ongoing since 2016. They have offered an extended warranty on the vehicle 10 years and 120,000 miles as they know there is a defect. It is dangerous and needs to be covered for all of the affected vehicles.

NHTSA ODI 11448292

When accelerating to pass a vehicle the check engine light comes on and there is loss power. When this happens there is a huge potential of a crash. The car has to be shut off to try and reset this. When you are on the frwy this puts life at danger. The code is a p002 and if you research it Mercedes is aware of this and is most likely a defective high pressure fuel pump problem that needs replacing but there have been no recalls. I have looked it up on you tube and has been on ongoing issue with no recalls as of yet. I am taking my car to dealer on 11/15/2021 for this issue which they will charge me for even though its a safety issue

NHTSA ODI 11440301

The rear drivers side had a loud chunking/clanking noise while driving and the vehicle was unable to control and break when in motion. Driving was impossible as the breaking component was a total failure and car could not be controlled while traveling down 45-50mph zone. I reduced my speed to 20-25 mph by letting off on the gas to get better control of the car if breaking would need to be suddenly made. I relied on the shoulder to pull off if any sudden breaking was needed. The car was immediately take to be reviewed by a specialized Mercedes benz mechanic and further inspection proved that the rear subframe on the driver’s (left) side was corroded and broken. The connecting arms are rusted, corroded and rendered the car inoperative. I notified my insurance company as well as car manufacturers corporate office. I researched this issue further and discovered that this reoccurring issue with this make and model. There are a pheletera of recounting of this same issue on various message boards to validate the same issues and callouts I found. The car was taken to the dealership that it was purchased and further inspection showed that the left side subframe/ subframe arms were corroded with rust and broken. The brake lines and fuel tank were equally rusted and corroded. The service manager confirmed that this is defect of the car but it had been part of a recall. I had the car towed for 2nd opinion to another dealership service department to access the car and this callout further validated the corrosion and rust was wide spread and has rendered the car inoperable unless these damages were fixed.

NHTSA ODI 11435789

P0002 FUEL VOLUME REGULATOR CONTROL CIRCUIT RANGE/PERFORMANCE MERCEDES C250, IF I'M EXPERIENCING A LACK OF POWER WHEN I PRESS THE GAS PEDAL AND I'M GETTING A P0002 CHECK ENGINE LIGHT, THERE'S A HIGH PROBABILITY THAT I WILL NEED A NEW HPFP HIGH PRESSURE FUEL PUMP.

NHTSA ODI 11408356

WHEN ACCELERATING TO PASS ON HIGHWAY CAR SUDDENLY GOES INTO LIMP MODE AND LOSSES POWER THIS IS DANGEROUS AT 70 PLUS MILES PER HOUR, ECM CODE READS P0002 HIGH PRESSURE FUEL REGULATOR FAILURE, CHECK ENGINE LIGHT WILL STAY ON UNTIL CAR HAS BEEN SHUT OFF FOR LONGER THAN TEN MINUTES OR IF YOU HAVE A SCANNER YOU CAN ERASE CODE AND DRIVE THE CAR NORMAL, NO PASSING. THIS HAS ALSO HAPPEN PULLING OUT FROM A STOP LIGHT CAR HAS BUCKLE WITH IMMEDIATE POWER LOSS AND WILL ONLY CREAK UP IN LIMP MODE JUST ENOUGH TO GET YOU HOME. I AM A WELL SEASON MECHANIC WITH OVER 20 YEARS EXPERIENCE AND THIS IS ABSOLUTELY DANGEROUS. PLEASE DON'T WAIT UNTIL SOMEONE GETS HURT OR KILLED BY THIS WHICH IS A KNOWN ISSUE GOING BACK BEFORE 2012. THIS HAPPENED 3 TIMES THIS AST WEEK AND TODAY.

NHTSA ODI 11398601

EXTREMELY DANGEROUS FUEL LEAK - FUEL STARTED TO LEAK FROM THE TOP OF THE GAS TANK, INSIDE THE CAR FROM UNDER THE DRIVER SIDE REAR PASSENGER SEAT. VEHICLE WAS TAKEN TO CLOSEST SHOP AVAILABLE WHEN HEAVY FUEL SMELLS WERE NOTICED INSIDE VEHICLE WHILE DRIVING. A LOCAL TIRE SHOP, HAMIL FIRESTONE, LOOKED UNDER THE CAR AND IDENTIFIED THAT FUEL WAS LEAKING DOWN THE FRAME TO THE ROAD. SOMEHOW GASOLINE WAS ACTUALLY LEAKING FROM INSIDE THE CAR. I CONTACTED MERCEDES CORP IMMEDIATELY AND THEY SENT A TOW TRUCK TO COLLECT THE VEHICLE. I WAS TOLD THAT DUE TO THE NATURE OF THE ISSUE IT WAS EXTREMELY DANGEROUS TO DRIVE THE CAR. MERCEDES SAID THAT DESPITE THE CAR BEING OUT OF WARRANTY, SOMETHING LIKE THIS WOULD GO TO "UPPER MGMT" FOR REVIEW AND SHOULD BE TAKEN CARE OF BY MERCCEDES. NOW THE VEHICHLE IS STILL AT THE LOCAL MERCEDES DEALERSHIP WHERE THE HAVE CONFIRMED AN ISSUE WITH THE FUEL PUMP AND SEALS, AND THAT THE CAR IS DEFINETLY LESKING FUEL OUT ONTO THE ROAD.... BUT DESPITE A RECALL ON ALMOST EVERY OTHER 2012 MODEL CAR FOR THE SAME ISSUE, THEY ARE SAYING BECAUSE THIS VIN IS NOT INCLUDED IT DOESN'T MATTER THAT IT IS DOING THE SAME THING. THEY WANT ME TO PAY FOR THE REPAIR. I EXPLAINED THAT I OR MY CHILDREN, OR EVEN ALL OF US COULD HAVE BEEN INVOLVED IN A FATAL CAR FIRE DUE TO THE ISSUE!!! MERCEDES DIRECT RESPONSE WAS, "THAT IS THE RISK OF DRIVING A VEHICLE OUT OF WARRANTY." UNACCEPTABLE!!!

NHTSA ODI 11390625

I HAVE BEEN HAVING ISSUES WITH MY VEHICLE SINCE I PURCHASED IT. STARTING WITH ME NOT HAVING ENOUGH POWER FROM A START, IN AN ATTEMPT TO GAIN ENOUGH POWER TO DRIVE AT A SAFE SPEED FROM THE START, AS IF THE VEHICLE LAGS & NO MATTER THE GASOLINE OR SERVICE, THE PROBLEM NEVER CORRECTS. WHEN I'M TRYING TO GAIN SPEED TO MAINTAIN WITH THE FLOW OF TRAFFIC SAFELY THE VEHICLE LAGS NOTABLY BEFORE GAINING SPEED. I'M NOW HAVING TO REPLACE THE ENGINE BC THE OIL COOLANT HOSE BURST WHILE I WAS DRIVING ON THE HIGHWAY WITH MY CHILD IN THE CAR. MY CHECK ENGINE LIGHT ACTIVATED BUT THE ONLY NOTICE DISPLAYED ON THE DASH WAS THE ENGINE COOLANT WHEN IT WAS LOW. WHEN THE HOSE BURST WHILE I WAS DRIVING ABOUT 60MPH I HEARD A POP SOUND UNDER THE HOOD, SAW SMOKE COMING FROM THE EXHAUST, THEN A CLANKING NOISE UNDER THE HOOD THAT GOT LOUDER & LOUDER UNTIL I WAS ABLE TO PULL OFF OF THE HIGHWAY, & THEN I NOTICED A VERY LARGE AMOUNT OF OIL ON THE GROUND THAT LEFT A TRAIL ALONG THE GROUND FROM MY VEHICLE. THAT WAS VERY DANGEROUS AS MY VEHICLE LOST POWER DURING THAT INCIDENT. I'M TOLD BY THE MECHANIC, THE ENGINE HAS TO BE REPLACED. THIS HAPPENED WITHOUT A WARNING. THE MERCEDES BENZ IS SUPPOSED TO BE A SAFE & RELIABLE LUXURY VEHICLE & NOT A NIGHTMARE TO HAVE FOR THE OWNER.

NHTSA ODI 11385548

COLD ENGINE VEHICLE JERKING I TOOK IT TO MERCEDES OF FORT MYERS FL AND THEY TOLD ME THAT THEY COULDN'T FIND THE PROBLEM AND I TOOK IT TO SO MANY OTHER PLACES AND STILL CAN'T FIND IT I'M JUST WONDERING IF IT COULD BE A RECALL

NHTSA ODI 11354633

THE REAR SUBFRAME HAS CORRODED AROUND THE AREAS WHERE THE TRAILING ARM AND CONTROL ARM MEET THE SUBFRAME ON BOTH SIDES OF THE VEHICLE, AND HAS DISINTEGRATED AROUND THE DRIVERS SIDE REAR TRAILING ARM CAUSING IT TO HAVE DETACHED, ALONG WITH A PIECE OF THE SUBFRAME. THE METAL OF THE SUBFRAME IS DISTORTED AROUND THE AREA OF THE BREAK. THE DETACHED TRAILING ARM AND PIECE OF SUBFRAME ARE NOW MAKING CONTACT WITH THE FUEL TANK AS WELL. THE FUEL TANK COULD HAVE EASILY RUPTURED AND IGNITED WHEN THIS CAR WAS STILL IN OPERATION, AS THIS CAR WAS DRIVEN FOR SEVERAL DAYS BEFORE THE MANUFACTURING DEFECT WAS DISCOVERED. THE FAILURE HAPPENED WHEN COMING TO A GENTLE STOP FROM 20-30 MILES PER HOUR ON A STRAIGHT ROAD. THERE WAS A LOUD SNAPPING NOISE FROM THE DRIVERS SIDE REAR. THIS CAR HAD 92,000 MILES AT TIME OF THE STRUCTURAL FAILURE AND HAS BEEN REGULARLY SERVICED, EXCLUSIVELY AT MERCEDES-BENZ. MERCEDES-BENZ USA CUSTOMER SERVICE IS UNABLE TO OFFER ANY ASSISTANCE. THIS EXACT ISSUE HAS LED TO A RECALL OF THE SAME MODEL IN CANADA, AND THERE ARE COUNTLESS NHTSA REPORTS DESCRIBING SIMILAR STRUCTURAL FAILURES. MERCEDES-BENZ USA IS AWARE OF THIS ISSUE AND IS ALSO AWARE THAT THERE IS A RECALL IN CANADA, BUT HAS MADE IT CLEAR THAT GOODWILL WILL NOT BE EXTENDED.

NHTSA ODI 11352792

THERE ARE SMALL CRACKS THAT HAVE DEVELOPED IN THE TOP OF THE FUEL SENDING UNIT. THIS ALLOWS FUEL TO LEAK OUT OF THE TOP OF THE FUEL PUMP AND POOL IN THE CENTER OF THE PUMP WHERE THERE ARE A NUMBER OF ELECTRICAL WIRES THAT ARE SUBMERGED IN FUEL. THIS IS A POTENTIALLY DEADLY PROBLEM AS THERE IS A REAL POTENTIAL FOR IGNITION OF THE LEAKED FUEL WHICH IS RIGHT UNDERNEATH THE DRIVERS SIDE PASSENGER SEAT WHERE MY 5 YEAR OLD'S CHILD SEAT IS LOCATED. THERE IS ALSO AN EXTREMELY STRONG ODOR OF GAS INSIDE THE CAR WHICH IS STRONG ENOUGH TO CAUSE LIGHT HEADEDNESS AND POSSIBLE SYNCOPE. THIS IS AN EXTREMELY DANGEROUS SITUATION. THE NTSB OPENED UP AN INVESTIGATION OF THIS ISSUE THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION OPENED A PROBE IN JANUARY 2012 AFTER RECEIVING 20 REPORTS IN 2003-2006 E55 AMG VEHICLES AND EXPANDED THE PROBE LAST YEAR INTO ALL 2003-2008 E-CLASS VEHICLES. OWNERS SAID THEY REPORTED A STRONG ODOR OF GASOLINE FUEL BOTH INSIDE AND OUTSIDE OF THEIR VEHICLE, PARTICULARLY AFTER REFILLING THE FUEL TANK. MANY COMPLAINTS SAID THE ODOR SUBSIDED AFTER DRIVING SOME DISTANCE THEREBY LOWERING THE FUEL LEVEL IN THE TANK. OTHER OWNERS REPORTED THEY WOULD ONLY FILL THE GAS TANK TO ABOUT THREE-QUARTERS FULL TO AVOID THE ODOR. SOME OWNERS SAID FUEL LEAKED FROM THE FUEL FILTER/SENDER, LOCATED ON THE TOP OF THE FUEL TANK ON THE DRIVER'S SIDE, AND COLLECTED ON TOP OF THE TANK. THIS IS A KNOWN ISSUE BUT THERE ARE OTHER MODELS AND YEAR MODELS THAT ARE AFFECTED AND DID NOT FALL UNDER THE MERCEDES RECALL CAMPAIGN.

NHTSA ODI 11281869

POWER LOSS WHEN ACCELERATING. I PULLED OUT IN TRAFFIC AND ACCELERATED BUT...I LOSS POWER AND ALMOST GOT RUN OVER FROM THE ONCOMING TRAFFIC!!! MAJOR SAFETY ISSUE. ENGINE LIGHT COMES ON! THIS IS A HORRIBLE ISSUE FOR ANYONE THAT HAS EXPERIENCED THIS PROBLEM. I'M HOPING THERE HASN'T BEEN ANY FATALITIES DO TO THIS PROBLEM.

NHTSA ODI 11232227

I FIRST NOTICED THIS PROBLEM ABOUT 2 YEARS AGO. I WAS ON THE HIGHWAY GETTING READY TO PASS A BIG RIG. ABOUT 2 SECONDS AFTER I EXCELERATED I NOTICED THAT I LOST POWER TO THE ENGINE AND THE CHECK ENGINE LIGHT TURNED ON. I KEPT MY FOOT ON THE PEDAL HOPING TO REGAIN POWER TO PASS THE BIG RIG. I HAD NO SUCH LUCK. SHORTLY AFTER I HAD VEHICLES BEHIND ME HAVING TO SLOW DOWN BECAUSE MY CAR WOULDN'T EXCELERATE TO THE DESIRED SPEED. I FINALLY MADE MY WAY OUT OF THE HIGHWAY TO CHECK MY ENGINE. I COULDN'T SEE A PROBLEM BUT THE CHECK ENGINE LIGHT STAYED ON AND THE LOSS OF POWER CONTINUED. I HAD TO DRIVE MY CAR HOME SLOW. THE NEXT DAY I NOTICED THAT THE CHECK ENGINE LIGHT HAD TURNED OFF AND I WAS ABLE TO DRIVE THE CAR NORMAL. THE LOSS OF POWER IN THAT SITUATION WAS SCARY AND COULD HAVE GONE A LOT WORSE. I KNOW I AM NOT THE ONLY ONE WHO HAS EXPERIENCED THIS PROBLEM. I HAVE SEEN BLOGS AND YOUTUBE VIDEOS WHO DESCRIBE SIMILAR EXPERIENCES. PLEASE HELP FIND A SOLUTION BEFORE SOMEONE IS SERIOUSLY HURT DO TO THIS PROBLEM.

NHTSA ODI 11230749

THE STEERING WHEEL LOCKED COULD NOT START THE CAR. CAR WAS DRIVEN THEN TURNED OFF, WHEN YOU RETURN TO THE VEHICLE, IT WILL NOT TURN ON.EVERYTHING WAS UNRESPONSIVE,WHICH WONT TURN ON ENGINE. HAD TO TOW TO DEALERSHIP IT COST ME 1800.00. SO THEY SAID THE ELECTRICAL FOR CAR WAS BAD. THEN MY FUEL TANK LEAKED, THE COMPONETS TO THE FUEL TANK ALL WERE BAD, AND L COULD SMELL THE GAS IN MY CAR AND GARAGE. COST ME 805.00 TO REPAIR. LUCKY IT DID NOT BLOW UP

NHTSA ODI 11221084

AUTO ONLY HAS 56K MILES AND FUEL PUMP WENT OUT, AUTO STALLED IN CITY TRAFFIC 2 TIMES IN MOTION, NO WARNING ON ISSUE UNEXPECTED DUE TO LOW MILEAGE ON AUTO. NO ENGINE CODE TILL 200 MILES AFTER FIRST STALL, ENGINE LIGHT FINALLY CAME ON, THEN SECOND STALL HAPPENED. HAD CODE READ P008A TRIGGERED. TOOK TO PERSONAL MECHANIC FOR TESTING AND REPAIR. HAD THE SYSTEM TESTED FOR THE RELAY, THE FILTER AND IT WAS THE FUEL PUMP. FIRST OCCURRENCE 03/19/2019 SECOND OCCURRENCE 03/23/19.

NHTSA ODI 11192447