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

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

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)

25 of 516 complaints match · crash/fire/injury only · clear filters

Apr 12, 2024AirbagsCrash1 injury

I was in a collision and the airbags did not deploy. There was a recall on airbags for the Mercedes C300 within the year my vehicle was made, however, the recall did not include my VIN. Also, the sunroof drain is faulty, which was also recalled on other Mercedes C300s within the same production year, again not my VIN, but upon inspection by a certified dealership, it appears to be the same issue as other recalled vehicles.

NHTSA ODI 11582626

Dec 21, 2023AirbagsCrash1 injury

The airbags were supposed to have been fixed per recall by carriage house Mercedes in new London ct. my son was in a horrible front in collision and they did not deploy. None of them did. Accident happened 3 days ago insurance will pick up car today. I’d like this noted incase they need evidence

NHTSA ODI 11561237

Nov 3, 2023SuspensionBody & structure3 injuries

The subframe has rusted/fallen off. This is incredibly risky as the car cannot be driven safely and it happened without warning. My mechanic said it is not due to any driving incidents but through rust occurring on Mercedes' subframes, which are flimsy. It has been inspected professionally by a mechanic. There are NO warning lamps. This could kill someone on the highway as while braking the car veered left and right. I had small children in the car we all neck pain from the car veering while stopping on the highway. I have taken good care of my vehicle and have all maintenance current. This is a fault with the material on the subframe. For MB: All the subframes are on backorder and are incredibly expensive to fix. I have a video of the damage from the mechanic if needed.

NHTSA ODI 11553395

May 15, 2023EngineFire

The contact owns a 2011 Mercedes C300. The contact stated that while driving approximately 15 MPH the check engine began flashing and the vehicle stalled. The contact attempted to restart the vehicle and smoke was observed emanating from the front driver's tire. The contact stated that the fire exploded from the engine compartment. Additionally, the contact stated that she was locked in the vehicle by the driver's seatbelt, but was able to get out of the vehicle. The fire department extinguished the fire and a report was taken. There were no injuries sustained. The vehicle was towed to a salvage lot. The contact was not sure if the vehicle restarted. The manufacturer was not notified of the failure. The failure mileage was approximately 120,000.

NHTSA ODI 11522090

Jan 6, 2021LightsFire

TL* THE CONTACT OWNS A 2011 MERCEDES BENZ C300. THE CONTACT STATED WHILE DRIVING 25 MPH, WHEN THE MULTIPLE "LIGHTS OUT" WARNING LIGHT WAS ILLUMINATED. THE CONTACT WAS ABLE TO DRIVE TO HER RESIDENCE. THE CONTACT STATED WHILE INSPECTING THE VEHICLE SHE NOTICED THE BROWN WIRE WAS MELTED AND BURNED. THE VEHICLE WAS TAKEN TO LOCAL DEALER MERCEDES-BENZ OF CHERRY HILL (2151 NJ-70, CHERRY HILL, NJ 08002:(856) 663-3200), WHERE IT WAS DIAGNOSED WITH NEEDING THE "LIGHT ASSEMBLY UNIT" TO BE REPLACED. THE VEHICLE HAD NOT BEEN REPAIRED AS OF YET. UPON INVESTIGATION, THE CONTACT ASSOCIATED THE FAILURE WITH NHTSA CAMPAIGN NUMBER: 14V177000 (EXTERIOR LIGHTING), HOWEVER THE VIN WAS NOT INCLUDED. THE MANUFACTURER HAD BEEN INFORMED OF THE FAILURE AND INFORMED THE RECALL WAS COMPLETED WITH PRIOR OWNER OF THE VEHICLE. THE FAILURE MILEAGE WAS APPROXIMATELY 115,000.

NHTSA ODI 11386823

Oct 2, 2020Speed controlCrash

2011 MERCEDES BENZ C300. CONSUMER WRITES IN REGARDS TO UNINTENDED ACCELERATION. *LD THE CONSUMER STATED THE VEHICLE ACCLERATED OVER A CEMENT PARKING BARRIER AND INTO A TREE. THE DEALER WAS NOTIFIED.*JS

NHTSA ODI 11361835

Jun 24, 2019AirbagsCrash2 injuries

AIRBAGS DID NOT DEPLOY. WHILE DRIVING ON THE HIGHWAY, A DEER RAN ACROSS THE OPPOSITE SIDE LANE OF TRAFFIC AND COLLIDED WITH THE DRIVERS SIDE AND WINDSHIELD. THE ENTIRE DEER LANDED IN DRIVERS LAP AND PASSENGERS SIDE SEATS. NO AIRBAGS DEPLOYED. STATEFARM AND STATE TROOPER REPORTS WITH PHOTOS TAKEN. BOTH OCCUPANTS WERE TAKEN TO ER BY AMBULANCE AND TREATED.

NHTSA ODI 11222296

May 8, 2019LightsFire

MY FRONT PASSENGER HEAD LAMP CAUGHT FIRE ONE OF THE PARKING BULBS. ALL TJE WIRING IS EXPOSED AND MY LIGHTS STOPPED WORKING. MY RIGHT TAIL LIGHT ONE OF THE BULBS GOT OVER HEATED AND HAD TO TAKE OFF THE BULB.

NHTSA ODI 11206355

Oct 29, 2018AirbagsCrash1 injury

TL* TAKATA RECALL. THE CONTACT OWNS A 2011 MERCEDES BENZ C300. THE CONTACT STATED THAT THE MANUFACTURER HAD NOT INCLUDED THE VEHICLE IN THE RECALL REPAIRS FOR NHTSA CAMPAIGN NUMBERS: 16V363000 (AIR BAGS) AND 16V081000 (AIR BAGS) UNTIL AFTER THE VEHICLE HAD BEEN PURCHASED AS WELL AS THE CONTACT HAD EXPERIENCED A CRASH. THE CONTACT WAS AT A STOP AND A VEHICLE TRAVELING AT A HIGH RATE OF SPEED OVER 50 MPH, CRASHED INTO THE REAR OF THE VEHICLE. A DEALER WAS NOT CONTACTED TO INSPECT AND DIAGNOSE WHY THE AIR BAGS FAILED TO DEPLOY. A POLICE REPORT WAS FILED. THE DRIVER SUSTAINED INJURIES TO THE NECK, HEAD, BACK AND FURTHER MEDICAL TREATMENT WAS REQUIRED. THE VEHICLE WAS ABLE TO BE DRIVEN AWAY FROM THE CRASH. THE INSURANCE COMPANY COVERED THE COLLISION DAMAGES HOWEVER, THEY HAD NOT INSPECTED WHY THE AIR BAGS FAILED TO DEPLOY. THE MANUFACTURER WAS NOTIFIED OF THE CRASH YEARS LATER. THE APPROXIMATE FAILURE MILEAGE WAS 50,000.

NHTSA ODI 11143896

May 18, 2018AirbagsCrash1 injury

TL* THE CONTACT OWNED A 2011 MERCEDES-BENZ C300. WHILE DRIVING 30 MPH, THE CONTACT'S VEHICLE WAS STRUCK ON THE DRIVER'S SIDE ABOVE THE FRONT TIRE BY ANOTHER VEHICLE. THE AIR BAGS DID NOT DEPLOY. A POLICE REPORT WAS FILED. THE CONTACT SUSTAINED NECK AND BACK PAINS, AND HEADACHES, WHICH REQUIRED MEDICAL ATTENTION. THE VEHICLE WAS DESTROYED AND TOWED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 58,900.

NHTSA ODI 11096724

May 1, 2018AirbagsCrash

REPEATED LETTERS FROM MERCEDES DEALER, HOWEVER, THEY CONTINUE TO SAY THEY CAN'T FIX IT. TAKEDA AIRBAGS

NHTSA ODI 11091189

Apr 17, 2018AirbagsCrash

"TAKATA RECALL"

NHTSA ODI 11088590

Apr 2, 2018Fire

SUDDEN HUGE CAR FIRE WITH LOUD EXPLOSIONS. THE WHOLE FRONT OF THE CAR GOT TOTALLY BURNED DOWN. THE CAR WAS PARKED IN THE FRONT OF THE STORE WITH ENGINE RUNNING.

NHTSA ODI 11082418

Feb 17, 2018Electrical systemFire

PASSENGER SIDE LOWBEAM LIGHT BURNT OUT APPROX 2 MONTHS AGO, BULB REPLACED. FIVE DAYS AGO PASSENGER SIDE LOWBEAM LIGHT BURNT OUT AGAIN. PARKED CAR AFTER ABOUT A 15 MILE DRIVE, WITHIN 30 MINUTES CAR WAS ON FIRE AND ENTIRE FRONT END BURNT COMPLETELY. SHOULD THERE BE A RECALL FROM MERCEDES FOR FAULTY WIRING TO HEADLIGHTS BEFORE SOMEONE IS KILLED OR THEIR HOME DESTROYED IF FIRE STARTS WHILE CAR PARKED IN GARAGE?

NHTSA ODI 11073386

Feb 7, 2018AirbagsCrash

I WAS INVOLVED IN A CAR ACCIDENT AN AIR BAG NEVER DEPLOYED I BUMPED MY HEAD AN WIFE INJURED HER ARM. CAR RAN THE STREET TO THE OTHER SIDE AN MANAGE TO HIM THE IN THE RIGHT REAR TIRE AN HAD A FRONT END COLLISION. STREET COLLISION I WAS ON A MAIN STREET AN HAD THE RIGHT OF WAY.

NHTSA ODI 11067362

Dec 13, 2017Electrical systemFire

WE HAVE THE RECALL AND I AM SORRY I DO NOT HAVE THE NUMBER WHERE THE WIRING HARNESS TO THE TAIL LAMPS COULD MELT CATCHING FIRE CAUSING THE REAR LAMP TO GO OUT. MINE HAS DONE SO. MY WIFE DRIVES 35 MILES 1 WAY TO WORK EACH DAY AND BECAUSE IT WAS AT NIGHT WHEN THIS HAPPENED I HAD TO GO OUT ON I-64 WHICH IS A 70MPH INTERSTATE HIGHWAY AND DO A TEMP FIX SO SEE COULD GET HOME. I HAVE CONTACTED THE DEALER WHICH AT TIME PARTS WERE NOT AVAILED AND THE DEALER WAS TO CONTACT ME WHEN THEY RE AVAILED, WHICH THE YOUNG LADY EVEN WHEN THEY SENT OUT THE CONTACT BUT DID NOT BOTHER TO TELL THE REST. IT HAD BEEN SO LONG WE HAD FORGOTTEN ABOUT THE RECALL AND IT WASN'T TILL WE RECEIVED THE NOTICE ABOUT THE TAKATA INFLATOR RECALL WERE WE INFORMED THAT THE TAIL LAMPS ARE ON RECALL. NOT HAPPY ABOUT THE INFLATOR RECALL AND THAT THE MANUFACTURE HAS TRIED NOTHING TO MAKE US CONFIDANT ABOUT THIS WE FEEL VERY UNSAFE. BACK TO THE TAIL LAMPS WE DID MISS AN APPOINTMENT BUT DID CALL BACK TO GET ANOTHER ONE. WHEN THE DEALER STATED THAT THEY HAD NO APPOINTMENT ON THIS AND COULD NOT HELP ME WITH ALTERNATE TRANSPORTATION I COULD NOT LEAVE THE VEHICLE AT THAT TIME. I CALLED THE DEALER(TYSINGER MERCEDES)AND THE OFFERED NO SOLUTION AND WAS GIVEN MERCEDES CORPORATE NUMBER SPOKE WITH THE CUSTOMER REP EXPLAINED THE SITUATION AND WAS REFERRED TO THE MANAGERS WHO HAVE NOT REACHED OUT TO ME AND NOW I AM IN THE SAME SITUATION AS STARTED. IS THERE ANY THING YOU CAN DO TO HELP ME GET TIS MATTER FIXED?

NHTSA ODI 11054431

Oct 19, 2017AirbagsCrash

"TAKATA RECALL" I RECEIVED A LETTER FROM MERCEDES DATED AUGUST 2016 REGARDING THIS RECALL. SINCE THEN I HAVE CONTACTED THE FORT MYERS DEALERSHIP REQUESTING FREE REPLACEMENT. EACH TIME INCLUDING TODAY I WAS TOLD THEY DO NOT HAVE THE PARTS OR THE INSTRUCTIONS FROM CORPORATE TO REPLACE THE AIR BAGS. TODAY I RECEIVED A POST CARD REGARDING TK HOLDINGS FILING CHAPTER 11. LAST YEAR MY DAUGHTER WAS INVOLVED IN AN ACCIDENT CAUSING 19K OF DAMAGE AND THE AIR BAG DID NOT GO OFF. I DO NOT KNOW IF THAT IS A GOOD THING OR A BAD THING. SHE WAS TRAVELING EAST WHEN I STATIONARY TRUCK PULLED INTO HER LANE CAUSING PASSENGER FRONT END DAMAGE.

NHTSA ODI 11034505

Jun 7, 2017Electrical systemFire

TL* THE CONTACT OWNS A 2011 MERCEDES-BENZ C300. WHILE ATTEMPTING TO START THE VEHICLE, AN ABNORMAL SMOKE ODOR WAS PRESENT. THE VEHICLE WAS TOWED TO INSKIP MERCEDES, LOCATED AT 1557 BALD HILL ROAD, WARWICK, RI 02886, TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE SIGNAL ACQUISITION MODULE MELTED AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 41,282.

NHTSA ODI 10993753

Sep 19, 2016AirbagsCrash1 injury

I WAS IN ACCIDENT ON 8/15/16 SIDE IMPACT I WANT TO KNOW WHY THE SIDE AIRBAGS DIDN"T DEPLOY, THE CAR WAS TOTALED BY THE INSURANCE COMPANY. I WAS DRIVING ON A THE CITY STREET THE YOUNG MAN THOUGHT HE HAD THE RIGHT OF WAY TO TURN LEFT WITH INCOMING TRAFFIC AND HE STRUCK MY CAR FROM THE SIDE.

NHTSA ODI 10907709

Sep 9, 2015SteeringBody & structureCrash1 injury

THIS IS A WELL DOCUMENTED ACCIDENT AS IT INVOLVED A POLICE CHASE OF A FELON WHO RAN A RED LIGHT AT APPROXIMATELY 50 MPH. MY CAR WAS HIT ON THE LEFT FRONT SIDE AND IS DEEMED TOTALED. NO AIR BAGS DEPLOYED IN MY VEHICLE AND I REQUIRED EMERGENCY TRANSPORT TO THE LOCAL HOSPITAL EMERGENCY ROOM. THIS ALSO INVOLVED A POLICE SHOOTING INCIDENT WITH THE DEATH OF THE OTHER DRIVER. THE VEHICLE IS PENDING TOWING TO A SALVAGE YARD.THE PRIMARY CONCERN IS A QUESTION OF DEFECTIVE AIR BAG DEPLOYMENT AND FUTURE POTENTIAL INJURY TO OTHERS.

NHTSA ODI 10762414

Sep 8, 2015AirbagsSpeed controlBrakesCrash1 injury

TL* THE CONTACT OWNED A 2011 MERCEDES BENZ C300. WHILE AT A STOP, THE ACCELERATOR PEDAL WAS APPLIED AND THE VEHICLE VIOLENTLY ACCELERATED TO 30 MPH. THE BRAKE PEDAL WAS DEPRESSED, BUT FAILED TO RESPOND CAUSING THE CONTACT TO CRASH INTO THE REAR END OF ANOTHER VEHICLE. THE STEERING WHEEL AND THE STEERING COLUMN AIR BAGS DEPLOYED. AS A RESULT, THE CONTACT SUSTAINED KNEE AND BACK INJURIES THAT REQUIRED MEDICAL ATTENTION. A POLICE REPORT WAS FILED. THE VEHICLE WAS DESTROYED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 10,000.

NHTSA ODI 10762315

Aug 27, 2014Airbags1 injury

TL* THE CONTACT OWNS A 2011 MERCEDES BENZ C300. THE CONTACT STATED THAT THE DRIVER'S SIDE AIR BAGS DEPLOYED ON SEVERAL OCCASIONS. ON ONE OCCASION, THE CONTACT WAS ATTEMPTING TO EXIT A HIGHWAY AND THE HEAD RESTRAINT AIR BAG DEPLOYED CAUSING THE CONTACT TO BECOME UNCONSCIOUS. THE CONTACT SUSTAINED A HEAD CONCUSSION AND NECK INJURIES THAT REQUIRED MEDICAL ATTENTION. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 36,442.

NHTSA ODI 10628927

Apr 26, 2013Electrical systemFire

LEFT SIDE TAIL LIGHT ASSEMBELY MELTED AND CAUGHT THE TRUNK ON FIRE. I HAVE 10 OF THESE C300S THAT ARE AFFECTED WITH THE SAME PROBLEM. I HAVE SPOKE WITH MERCEDES ON THIS ISSUE AND THEY ARE DECLINING TO DO THE REPAIR AT NO COST. THIS IS A SAFETY ISSUE AND SHOULD BE COVERED NO MATTER WHAT..I HAVE FOUND THAT THIS IS A COMMON PROBLEM WITH THESE CARS AND YET THERE IS NO RECALLS OR TSBS ON THIS ISSUE. ANY HELP ON THIS WOULD BE APPRECIATED.. *TR

NHTSA ODI 10509639

Jan 21, 2013AirbagsCrash1 injury

THE AIR BAGS ON MY C300 MERCEDES 2011 DID NOT DEPLOY DURING FRONT CRASH. THE ACCIDENT HAPPENED AT A T INTERSECTION STREET. I WAS AT THE FRONT LANE AT A T INTERSECTION STOPPING DURING RED LIGHT. A VOLVO CAR FROM THE OTHER SIDE OF THE INTERSECTION THAT WAS TRYING TO MAKE A LEFT TURN-INTO THE STREET THAT I WAS STOPPING ON- CRASHED INTO MY VEHICLE FRONT TO FRONT AS A RESULT OF AVOIDING GETTING CRASHED BY ANOTHER CAR THAT WAS PASSING RED LIGHT INTO IT'S OPPOSITE DIRECTION. THE VOLVO THAT CRASHED INTO MY CAR FRONT TO FRONT PUSHED MY VEHICLE ABOUT 10 FEET BACK WORDS AND CAUSED MY VEHICLE TO CRASH INTO AN SUV WITH THE REAR RIGHT SIDE OF MY VEHICLE INTO THE REAR LEFT SIDE OF THE SUV THAT CAUSED MY CAR TO STOP. A POLICE REPORT WAS TAKEN AT THE SCENE. I THEN HAVE REQUESTED FROM THE COLLISION CENTER AT THE MERCEDES DEALER WHO HANDLED MY CAR, TO LOOK INTO THE AIR BAGS TO CHECK WHETHER THERE WERE A MANUFACTURE DEFECT WITH THE AIRBAG FOR NOT DEPLOYING. FEW DAYS LATER, MY CAR WAS REPORTED A TOTAL LOSS. *TR

NHTSA ODI 10493639

Jan 24, 2012BrakesCrash

TL* THE CONTACT OWNS A 2011 MERCEDES BENZ C300. THE CONTACT STATED THAT WHILE ENTERING A PARKING SPACE, THE BRAKES FAILED AND THE VEHICLE WENT OVER A CURB AND SLIGHTLY CRASHED INTO THE FRONT OF A BUILDING. THERE WAS NO DAMAGE TO THE VEHICLE BECAUSE THE VEHICLE WAS MOVING AT SUCH A SLOW RATE OF SPEED. THE CONTACT STATED THAT THE VEHICLE DID NOT ACCELERATE BUT CONTINUED ROLLING AND WOULD NOT STOP. THE DEALER INSPECTED THE VEHICLE AND DETERMINED THERE WAS NOTHING WRONG WITH THE VEHICLE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND THE CURRENT MILEAGE WAS 4,100.

NHTSA ODI 10445099

Working with the data? Download all 516 complaints as CSV · fetched from NHTSA July 21, 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 Phev verdict →