What 284 owners told NHTSA about the 2014 Mercedes-benz C-class Phev

Driving on [XXX] to Atlanta GA my car would not automatically shift and began to vibrate badly. I was almost hit by other vehicles as I pulled off the highway to check car out. Car was vibrating badly in idle and when I resumed my trip back home the car would not accelerate properly and caused tremendous stress and danger. Figured out that car would not shift automatically and I was forced to shift the car manually. Car would sputter and vibrate badly and would only slightly less vibrate to where I could drive it home in gear D5 and would less vibrate at 75+ mph very dangerous, and would lose power and shake violently going up highway hills. I prayed all the way home and barely made it shaken. I called my Mercedes Benz Dealer from the highway and immediately scheduled appointment on 8/15/24. This was a major safety hazard and life threatening situation with my Mercedes Benz C250 2014 car. My car 100% serviced over the years at dealership I bought it from Rick Hendricks Mercedes Benz of Lake Norman NC. Thank you for your time! Actor & Model [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11607584

I was trying to merge onto a freeway from a complete stop and because this freeway has an extremely short on-ramp, you need to get up to a high speed in very little time. As such, I put my car in Sport driving mode and accelerated very hard from a complete stop. The car accelerated as normal for a few seconds (I reached approximately 40 to 50 MPH), then I felt the car lag and felt a loss of power. The car was in limp mode and I couldn’t accelerate even though I was pressing the gas pedal all the way to the floor. A few seconds after this occurred, I notice that the check engine light turned on. I was able to maintain a speed around 50 MPH and got off the freeway. I took my car to both the Mercedes dealership and an independent mechanic and both diagnosed a failure of the high pressure fuel pump. I also tried to see if this will happen again and after hard acceleration in regular driving mode, the exact same issues occurred. I have read that there are issues with the high pressure fuel pump with my car model and I ask that you guys please investigate thoroughly to see if a recall would be necessary. Losing power while accelerating is extremely dangerous and a huge safety hazard for all drivers on the road. I could have easily been rear ended by another driver since I couldn’t accelerate to a faster speed. I have not yet replaced the high pressure fuel pump but plan to do so in the next few days. Attached is the diagnostic invoice from the Mercedes dealership. As stated on the invoice, please note that my car only has 43,000 miles, which makes the high pressure fuel pump failure very surprising.

NHTSA ODI 11433064

SUDDEN LOSS OF POWER WHILE TRYING TO ACCELERATE,ENGINE LIGHT COMES ON AND CAR GOES INTO LIMP MODE. CODE P002. CAR HAS 44450 MILES.

NHTSA ODI 11360324

I CAN'T BELIEVE I EXPERIENCED THAT .. MY CAR ALL OF THE SUDDEN JERKED ON THE FREEWAY AND STARTED SHAKING . I SERIOUSLY THOUGHT WE HAD AN EARTHQUAKE .. THEN IT ACCELERATED AND THE NEXT THING YOU KNOW I'M GOING 25 MILES AND HOUR .. SO GLAD I WAS NEAR AN EXIT I PUT THE CAR IN NEUTRAL ROLLED DOWN THE HILL , MADE A TURN AND SHUT IT OFF .TOOK ME A MINUTE TO GATHER MYSELF .. WHAT IF I WAS IN A MIDDLE LANE ? WHAT IF SOMEONE COULDN'T PRESS THE BREAKS IN TIME🤦🏻‍♀️🤯😡...

NHTSA ODI 11344258

TL* THE CONTACT OWNED A 2014 MERCEDES-BENZ C350. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATELY 15-30 MPH, THE VEHICLE INDEPENDENTLY ACCELERATED. THE CONTACT STATED THAT HE WAS UNAWARE OF HOW HIS FOOT ENDED UP UNDER THE ACCELERATOR PEDAL. THE VEHICLE WAS THEN INVOLVED IN A FOUR VEHICLE COLLISION. THE CONTACT STATED THAT ALONG WITH HIS WIFE WHO WAS IN THE CAR AT THE TIME, SHE WAS INJURED ALONG WITH ONE OTHER OCCUPANT OF ONE OF THE OTHER VEHICLES. IT WAS UNKNOWN WHERE THE WIFE WAS SEATED. MEDICAL ATTENTION WAS SOUGHT SEVERAL DAYS AFTER THE COLLISION BY THE CONTACT AND HIS SPOUSE. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO A TOWING LOT. AAA WAS ABLE TO RETRIEVE DATA FROM THE VEHICLE DATA RECORDER. THE CONTACT WAS INFORMED THAT A COMPREHENSIVE REPORT COULD BE ATTAINED BY EQUIPMENT THAT ONLY THE DEALER OR MANUFACTURER POSSESSED. THE VEHICLE WAS NOT REPAIRED. THERE WAS NO DIAGNOSTIC CHECK OR INSPECTION PERFORMED ON THE VEHICLE. A DEALER WAS NOT CONTACTED. THE VEHICLE WAS DESTROYED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 34,366. *JS

NHTSA ODI 11206504

2014 MERCEDES BENZ C350. CONSUMER WRITES IN REGARDS TO DEFECTIVE ACCELERATION SYSTEM. *LD THE CONSUMER STATED THE CRUISE CONTROL MALFUNCTIONED CAUSING A 4 CAR COLLISION. THE CONSUMER STATED THE INFORMATION IN THE POLICE REPORT WAS FALSE AND THAT THE CRASH WAS INADEQUATELY INVESTIGATED. *JS

NHTSA ODI 11196319

I WAS STOPPED IN FRONT OF MY GARAGE (WAITING FOR THE DOOR TO GO UP). WHEN I LIGHTLY PRESSED ON THE GAS PEDAL TO PULL IN, THE ENGINE ROARED AND THE CAR SUDDENLY LEAPED FORWARD AT A VERY HIGH RATE OF SPEED, GOING THRU MY DETACHED GARAGE WALL. THE ACCELERATOR PEDAL STUCK AND I COULD NOT GET THE CAR TO STOP. I HAVE PULLED INTO THIS GARAGE THOUSANDS OF TIMES AND KNEW THIS WAS THE CAR. SLAMMING ON THE BRAKES COULD NOT STOP THE CAR BECAUSE IT WAS ACCELERATING TOO QUICKLY. HITTING THE BRICK FACADE OF THE CONDOMINIUM, BEYOND THE DETACHED GARAGE WAS THE ONLY THING THAT STOPPED THE CAR. NO AIRBAGS DEPLOYED, WHICH I THOUGHT THEY SHOULD HAVE BECAUSE OF THE IMPACT. EVEN THOUGH I ONLY TRAVELED APPROXIMATELY 30 FEET, THE CAR ACCELERATED SO QUICKLY, IT TOTALED THE CAR. THE CAR IS CURRENTLY UNDER RECALL AS OF NOVEMBER 2017, FOR A STEERING COLUMN ISSUE, WHICH INCLUDES IMPROPERLY GROUNDED COMPONENTS AND THE STEERING COLUMN CLOCK SPRING BEING BROKEN ISSUE RELATED TO THE AIRBAGS DEPLOYING WHILE DRIVING THE CAR. I HAVE TIRED SEVERAL TIMES TO HAVE THE CAR REPAIRED AND HAVE BEEN TOLD THE MERCEDES DEALERSHIP STILL DOES NOT HAVE THE PART. PER THE DEALERSHIP AND MERCEDES, I WAS ADVICED I WOULD RECEIVE A LETTER WHEN IT WAS AVAILABLE. I PURCHASED THE CAR USED AND HAVE SINCE FOUND OUT SINCE THIS IS THE THIRD RECALL ON THIS VEHICLE. I BELIEVE IT HAD TO BE SOMETHING WITH EITHER THE ACCELERATOR AUTOMATICALLY ENGAGING. IT WAS ALMOST LIKE THE CRUISE CONTROL QUICKED IN. SINCE IT IS UNDER RECALL FOR THE STEERING WHEEL RELATED ISSUE, I DON'T KNOW IF IT AFFECTED THE CRUISE CONTROL AND CAUSED THIS TO HAPPEN.

NHTSA ODI 11091327

WHILE SLOWING TO APPROACH A PARKING SPACE, THE CAR SPED FORWARD AND JUMP THE CURVE CRASHING INTO A STOREFRONT. NO ONE INJURED. STEPPING ON THE BRAKES DID NOT STOP OR EVEN SLOW DOWN THE CAR.

NHTSA ODI 11081778

TL* THE CONTACT OWNS A 2014 MERCEDES BENZ C250. WHILE DRIVING APPROXIMATELY 65 MPH, A WARNING LIGHT ILLUMINATED AND THE VEHICLE DECELERATED AND BECAME INOPERABLE. THE VEHICLE WAS ABLE TO BE RESTARTED AND WAS TOWED BY THE DEALER, WHO WAS NOT ABLE TO DIAGNOSE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 10,000.

NHTSA ODI 10721554

TL* THE CONTACT OWNS A 2014 MERCEDES BENZ C300. WHEN THE IGNITION WAS TURNED TO THE ON POSITION AND THE VEHICLE WAS SHIFTED INTO DRIVE WITH THE BRAKE PEDAL DEPRESSED, THE VEHICLE ACCELERATED WITHOUT WARNING. THE VEHICLE CRASHED INTO A TRAFFIC LIGHT POLE. THE CONTACT SUFFERED LACERATIONS TO THE HEAD, MUSCLE DAMAGE TO THE LEGS, AND A FRACTURE ON THE EYE SOCKET. THE CONTACT RECEIVED MEDICAL ATTENTION. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO THE CONTACT'S INSURANCE COMPANY. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 11,000.

NHTSA ODI 10713334

I PURCHASED THIS C250 IN DEC 2013, HAVE 3 SIMILAR OCCURRENCE WERE THE ENGINE FAILED TO RESPOND. ONCE COMING OUT OF A LIGHT, AND TWICE ON I-95 BOTH TIMES TRYING TO SWITCH LANES TO GET OUT OF ON COMING TRAFFIC, AND ON BOTH OCCASIONS THE VEHICLE DID NOT RESPOND TO THE GAS PEDAL. ONE OF THE INCIDENTS OCCURRED WITH CRUISE CONTROL ENGAGED. WE WERE LUCKY WERE NOT KILLED BY THE SEMI TRACTOR TRAILERS. AM A RETIRE AIR FORCE FIREFIGHTER AND I HAVE SEEN SOME HORRIBLE STUFF ON THE HIGHWAYS, THANK GOD IT WAS NOT MEANT TO BE THOSE DAYS. I CONTACTED MERCEDES-BENZ USA HQ. ON ALL THESE SAFETY OCCURRENCE BELOW AND ALL [XXX] AT HQ 1 800 367 6372 [XXX] WOULD TELL ME IS THAT VEHICLE WAS UNDER WARRANTY.... ON THE LAST TIME IT HAPPEN THEY SAID THE NEW ENGINE HAD BACKFIRED AND THEY WERE GOING THE REPLACE A FUEL PORT OR SOMETHING... IN THIS NEW VEHICLE. ENGINE 3X, NEW BRAKES, ALIGNMENT, DEAD BATTERY, TAN LEATHER TURNING BLUE. THANKS IN ADVANCE. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

NHTSA ODI 10618354