2010 MERCEDES BENZ C300 Fuel/propulsion System Problems

Dealer notes, fuel tank, and hold down straps are rusted and rotted

Fuel smell when gas tank is full. Engine code P0456

Cracks have formed in the plastic cover over the fuel pump in the fuel tank under the back seat. Gas is seeping out when the tank is full.

Filled up gas and strong gas smell can be smelt throughout the car and Check engine light came on, took car to auto zone for report. Stated emissions code was listed. Was told to replace gas cap and code should clear. Replaced gas cap, still had code. Took car to shop and was told this model has this issue with this specific year and newer, and the problem could be one of 3 things. Replace gas cap, did that, replace fuel pump closing cover, did that, replace purge valve canister, did that. Check engine light still comes on and strong gas smell still exist after each fill up. Mechanic told me reach out because there was a recall on this same model a few years back...

Gas smell inside the car. Fuel leak when gas tank us full.

Raw gas smell after filling up with gas .

STRONG SMELL OF FUEL AFTER FILLING UP GAS TANK 3/4 OR MORE FOR THE PAST 12MONTHS

STRONG GASOLINE SMELL WHEN I FILL MY TANK UP AND PARK MY CAR INSIDE MY GARAGE. SO STRONG THAT I WORRY ABOUT EXPLOSION DUE TO MY WATER HEATER WITH PILOT LIGHT IN THE GARAGE. I FREQUENTLY OPEN THE GARAGE DOOR TO LET THE ACCUMULATED GAS ODOR DISSIPATE OR HAVE TO MOVE THE CAR OUTSIDE. STRONG GASOLINE SMELL GOES AWAY ONCE THE FUEL LEVEL GOES DOWN ABOUT 1/8 TO 1/4. THIS HAS BEEN GOING ON SINCE 12/20/2020.

Mileage: 41,000

STRONG SMELL OF GASOLINE WHEN TANK IS FILLED UP.

Mileage: 100,000

STRONG SMELL OF GASOLINE WHEN TANK IS FILLED UP. THIS HAS BEEN AN ONGOING ISSUE FOR A FEW MONTHS NOW. DON'T KNOW MUCH ABOUT CARS SO DIDN'T THINK MUCH OF IT UNTIL I HAD A COUPLE OF PEOPLE ASK WHY MY CAR SMELLED LIKE GAS. THEY LET ME KNOW THAT IT MAY BE A GAS LEAK SOMEWHERE.

Mileage: 154,000

HEAVY GAS FUMES FROM VEHICLE ESPECIALLY WHEN FUEL FILL UP.

Mileage: 43,000

TL* THE CONTACT OWNS A 2010 MERCEDES-BENZ C300. A FEW YEARS AGO, THE CONTACT DETECTED A FUEL ODOR COMING FROM THE VEHICLE. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF FOOTHILL RANCH (81 AUTO CENTER DR, FOOTHILL RANCH, CA 92610, (949) 354-0112) WHERE IT WAS DIAGNOSED THAT THE REAR PASSENGER SIDE FUEL FENDER SEAL/ SEAL RING FAILED. THE VEHICLE WAS REPAIRED, BUT THE ODOR RECURRED. THE VEHICLE WAS TAKEN BACK TO THE SAME DEALER WHERE IT WAS DIAGNOSED THAT THE FUEL FILTER HOUSING WAS LEAKING AND THE REAR PADDING AND LOWER SEAT CUSHION WERE SATURATED WITH FUEL AND NEEDED TO BE REPLACED. THE CONTACT STATED THAT THE ENTIRE REAR SEAT WAS REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND DID NOT ASSIST. THE APPROXIMATE FAILURE MILEAGE WAS 108,989.

Mileage: 108,989

FUEL LEAKING INTO MAIN CABIN. POOL OF FUEL RESTING ON TOP OF THE FUEL SENDING UNIT LOCATED UNDER PASSENGER REAR SEAT. DRAINING INTO BACK OF SEAT AREA. PARTICULARLY NOTICEABLE UPON NEW FILLING OF TANK OR DRIVING ON CURVY ROADS.

Mileage: 99,962

THE VEHICLE SMELLED OF A GAS LEAK. THE ISSUE WAS MENTIONED TO SERVICE ADVISORS BUT DISMISSED AS A NON-ISSUE. THE ISSUE PERSISTED CAUSING BREATHING PROBLEMS AND LIGHT HEADEDNESS. AFTER TWO SERVICE VISITS THE ISSUE WAS STILL NOT ADDRESSED. CONVENIENTLY AFTER 150,000 MILES THE SERVICE DEPARTMENT WAS ABLE TO FIND THE ISSUE, BUT THEN STATED THAT IT WAS NO LONGER COVERED UNDER WARRANTY. PREVIOUS TIMES THE CAR WAS BROUGHT IN UNDER 150,000 MILES THEY WERE NOT ABLE TO FIND THE PROBLEM.

THE FUEL TANK HAVE RUST CAUSE IT TO LEAK, A RISK OF AN ENGINE FIRE OR CRASH BECAUSE OF A FUEL TANK ISSUE.

EXACTLY AS DESCRIBED WITH OTHER MODELS, THERE WAS A STRONG GAS ODOR INSIDE AND OUTSIDE OF THE VEHICLE. IT WORSENED AFTER THE CAR WAS REFUELED. IT GOT SO BAD THAT FUMES WERE SEEPING INTO THE HOUSE FROM THE GARAGE. WHILE DRIVING, ALL WINDOWS HAD TO BE DOWN. AFTER RESEARCHING ONLINE, I FOUND OUT THAT THERE WAS A RECALL ON OTHER MERCEDES YEARS AND MODELS FOR THE SAME ISSUE. THE GAS TANK GASKET IS DEFECTIVE. MY CAR IS NOT INCLUDED IN THE RECALL AND I MUST PAY TO FIX THE HAZARDOUS CONDITION.

SMELLING GAS FUMES INSIDE THE CAR, HAS GOTTEN LIGHT HEADED WHEN DRIVING, AND MY GAS GAGE DOES NOT WORK.

Mileage: 112,000

FUEL TANK LEAK- SMELL GAS IN CAR AND OUTSIDE CAR. RECEIVED NOTICE OF AIRBAG RECALLS AND LIGHT ISSUE AS WELL. MAIN CONCERN IS GAS SMELL EMANATING FROM MY CAR. THIS HAPPENS MOSTLY WHEN I FILL THE TANK.

Mileage: 83,000

THE COMPANY AND THE DEALER IN FREZNO CA REFUSE TO REPLACE THE AIR BAGS AND LEAKY FUEL PUMP

Mileage: 50,000

TL* THE CONTACT OWNS A 2010 MERCEDES-BENZ C300. WHILE DRIVING, THE ENGINE WARNING INDICATOR ILLUMINATED AND A FUEL ODOR ENTERED THE VEHICLE. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF SOUTH MISSISSIPPI (11619 BOBBY ELEUTERIUS BLVD, D'IBERVILLE, MS 39540), BUT THE FAILURE COULD NOT BE DUPLICATED. DAYS LATER, THE FAILURE PERSISTED. THE VEHICLE WAS TAKEN BACK TO MERCEDES-BENZ OF SOUTH MISSISSIPPI, BUT THE CAUSE OF THE FAILURE COULD NOT BE DIAGNOSED. THE VEHICLE WAS NOT REPAIRED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE THEY INFORMED THE CONTACT THAT THERE WAS LIQUID GAS FORMED ON TOP OF THE FUEL PUMP AND A SEAL NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 70,000.

Mileage: 70,000

TL* THE CONTACT OWNS A 2010 MERCEDES-BENZ C300W. WHILE DRIVING, THE CONTACT NOTICED A FUEL ODOR THROUGHOUT THE VEHICLE. THE CONTACT MENTIONED THAT THE FUEL ODOR BECAME EXTREMELY STRONG. THE CONTACT THEN NOTICED FUEL ON THE GROUND AND STATED THAT FUEL WAS VISIBLE EVERYWHERE WHEN THE VEHICLE WAS PARKED. THE VEHICLE WAS TAKEN TO W.I. SIMONSON MERCEDES-BENZ AT (855) 677-2690 (1626 WILSHIRE BLVD, SANTA MONICA, CA 90403), BUT THE FAILURE COULD NOT BE REPLICATED. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ IN PALM SPRINGS WHERE THE CONTACT WAS ADVISED TO TAKE THE VEHICLE BACK TO W.I. SIMONSON MERCEDES-BENZ WHERE IT WAS DIAGNOSED THAT THE FUEL TANK NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS UNAVAILABLE.

TL* THE CONTACT OWNS A 2010 MERCEDES BENZ C300. THE CONTACT STATED THAT FOR THE PAST MONTH, A FUEL ODOR INSIDE THE CABIN DEVELOPED. THE CONTACT NOTICED A WET SPOT ON THE DRIVEWAY AND UPON INSPECTION DID NOT FIND WHERE THE FUEL WAS LEAKING FROM. THE VEHICLE WAS TAKEN TO CALIBER MOTORS MERCEDES BENZ OF ANAHEIM CALIFORNIA AND THE DIAGNOSIS WAS THAT THE PASSENGER SIDE SIDE FUEL SENDING UNIT COVER AND SEAL WERE WORN OUT AND NEEDED REPLACEMENT. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 70,000. THE VIN WAS NOT AVAILABLE.

Mileage: 70,000

TAKATA RECALL. AFTER PURCHASING MY 2010 MERCEDES C-300 I'VE NOTICED A GAS SMELL FROM THE REAR PASSENGER SIDE BUT THIS HAS GOTTEN WORSE AFTER I PARK MY CAR IN MY GARAGE OVERNIGHT. THE ENTIRE GARAGE AND VEHICLE INTERIOR SMELL LIKE GAS. I THEN NOTICE A GAS LEAKAGE SPOT FROM THE REAR PASSENGER SIDE TIRE. THIS HAPPENS WHEN I HAVE FULL TANK OR HALF OF THE TANK FULL OF GAS. I RED ABOUT THIS ONLINE I CALLED THE DEALERSHIP BUT I WAS TOLD THE RECALL/ EXTENSION TANK WARRANTY DOES NOT APPLY TO MY CAR. CONCERNING THE SEAT-BELT THE REAR PASSENGER SIDE SEAT BELT IS DEFAULT. IT DOES NOT BUCKLE

THE CHECK ENGINE LIGHT COMES ON DEALING WITH THE CATALYTIC CONVERTER/FUEL SYSTEM. THE SENSORS ARE OFF CAUSING THE EMISSION OF TOO MUCH GAS. THE CAR RUNS OUT OF GAS FAST AND DOES NOT DRIVE WELL TO GET GOOD GAS MILES PER TANK. THE CAR'S EXTERIOR LIGHTS ALSO GO OUT FAST. THIS SHOULD NOT HAPPEN WITH A TOP OF THE LINE MERCEDES CAR.

Mileage: 50,000

OUR 2010 MERCEDES C300 WITH 24,500 MILES CAR STARTED TO SELL GASOLINE APPX A WEEK AGO. WE FOUND OUT THAT MERCEDES HAS SIMILAR PROBLEMS WITH THEIR OTHER CARS AND I BELIEVE THIS IS A VERY SERIOUS PROBLEM SINCE IT INVOLVES GASOLINE. THE MERCEDES DEALER STATED THAT OUR CAR DOES NOT HAVE A RECALL FOR THIS PROBLEM EVEN THOUGH IT HAS THE SAME PROBLEM AS THE OTHER RECALLED MODELS. THE SMELL IS CONSTANT AND WE CANNOT EVEN PARK OUR CAR IN OUR GARAGE DUE TO THE FUMES AND STRONG SMELL. MERCEDES OF PALM SPRING LIKE TO CHARGE US $256 JUST TO LOOK AT THE CAR SO WE TOOK OUR CAR TO ANOTHER REPAIR SHOP AND THEY STATED THAT THE FUEL TANK HAS A PROBLEM AS THE OTHER MODELS AND OUR CAR IS THE 3RD MERDECES THAT THEY INSPECTED WITH THE SAME PROBLEM THAT WEEK. AT THIS TIME MERCEDES IS REFUSING TO REPAIR THIS ON A WARRANTY AND AS I STATED THIS IS A SAFETY ISSUE. I BELIEVE THIS IS A VERY SERIOUS SAFETY ISSUE.

Mileage: 24,000

TL* THE CONTACT OWNS A 2010 MERCEDES BENZ C300. UPON ENTERING THE VEHICLE, THERE WAS A FUEL ODOR COMING FROM THE FUEL TANK. THE FAILURE OCCURRED ON SEVERAL OCCASIONS. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE FUEL FILTER WAS CRACKED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 65,000. THE VIN WAS NOT AVAILABLE.

Mileage: 65,000