What 435 owners told NHTSA about the 2015 Mercedes-benz C-class Hybrid

The contact owns a 2015 Mercedes Benz C250. The contact had initially received a recall notice for NHTSA Campaign Number: 19V010000 (AIRBAGS). The contact took the vehicle to the local dealer and had the recall serviced. The contact stated that while driving at 35 MPH, another vehicle made a left turn and hit his vehicle in the middle of an intersection. The contact stated that the air bags did not deploy upon impact. The authorities were called to the scene and a police report was filed. No medical attention was rendered at the scene of the accident. The vehicle was towed to an independent mechanic where it remained in their possession. The contact sought medical attention later that day at a local hospital where he was treated for a strain to his left neck and left leg. The dealer nor the manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 60,000.

NHTSA ODI 11436009

Hi so i woke up this morning and my started my car as usual then noticed the smell of gas all around the car Inside and out. I got worried turned off the car and started sniffing around to see if i can find where the leak was and found out the high pressure fuel pump was leaking i looked up info on this part and it is very common on these car for that part to fail. Im very upset that there is no recall yet when the dealership told me that they do 2-3 of those jobs a week (HIGH PRESSURE FUEL PUMP REPAIRS) and still no recalls on this,what is it going to take to get one?, my car has to blow up to get your guys attention?? Oh wait other Mercedes c300 cars in the united states already caught on fire please fix this saftey hazard i want to feel safe and not worry about catching on fire. ITS BEEN 6 years AND STILL HAVE NO RECALLS FOR THIS CAR ???

NHTSA ODI 11435095

The engine stalled at idle numerous times when at a stop light or stop sign. This was dangerous as the other cars could have ran into my car in anticipation that I should be moving with traffic. The car was taken to the Mercedes Marin dealer service center and diagnostic was done indicating a cracked piston in cylinder one was causing loss of compression and could also cause engine failure at speed if not taken care of. Check engine light DID NOT come on. During research on repairs for this issue, it became apparent that Mercedes Benz is aware of this issue in many of its engines of this model and year, but did nothing to remedy the situation or the underlying manufacturing defect that causes the cracked piston. In addition, Mercedes is unwilling to cover the cost of repair or replacement (car has only. 49,000 miles, but is out of warranty due to age).

NHTSA ODI 11434943

The contact owns a 2015 Mercedes-Benz C300. The contact stated while driving 50 MPH, the contact heard an abnormal flapping sound coming from the opened panoramic moon roof. The contact reached up into the open moon roof and discovered that the adhesive bonding on the front panel had started to deteriorate. The contact took the vehicle to the local dealer and was confirmed the failure however, the contact was informed that the dealer was not equipped to perform the repair. The contact was referred to Mercedes-Benz of Wilkes-Barre (150 Motorworld Dr, Wilkes-Barre, PA 18702) where the mechanic removed the bonded panel and installed a new front panel which the contact paid for out of pocket. The first dealer then notified the contact of NHTSA Campaign Number: 21V197000 (Structure) and instructed him to call the dealer where the vehicle was repaired. The second dealer was notified of the failure and informed him to call the manufacturer for potential reimbursement. The manufacturer was notified of the failure and informed him that the vehicle was not included in the recall. The vehicle was repaired. The failure mileage was approximately 68,000.

NHTSA ODI 11433168

Panoramic glaaa sunroof mounting bracket made of cheap thin plastic that it breaks easily allowing the panoramic glass roof to fly off the car if driven while open.

NHTSA ODI 11431700

The contact owns a 2015 Mercedes-Benz C300. The contact’s wife stated while driving 70 mph, the roof panel separated and detached from the vehicle. The vehicle was diagnosed but not repaired. Upon investigation, the contact associated the failure with NHTSA campaign number: 21V197000 (Structure) however, the part to do the recall repair was not yet available. The manufacturer was informed of the failure but offered no assistance. The failure mileage was approximately 57,000.

NHTSA ODI 11427645

Panoramic Sunroof has had several problems previously. While driving 65 mph the plastic roof piece between the windshield and sunroof suddenly and unexpectedly dislodged and flew off the car.

NHTSA ODI 11424925

I would like to bring to your attention a potentially dangerous design flaw in my 2015 Mercedes C300. That design flaw resulted in me having to cut the seat belt off a passenger, my wife, in order to free her from the car. I will also explain in detail the admittedly rare circumstances that led to this potentially dangerous incident. In May 2021, my wife underwent outpatient surgery of her left shoulder. After the surgery a nurse brought my wife to the curb in front of the hospital, where I had pulled up my car. The nurse and I assisted my wife with her transfer from the wheel chair into the passenger seat. My wife was wearing a sling supported by a spacing pillow on her left arm. The nurse then proceeded to fasten the seat belt around my wife. Since the nurse’s procedure is of importance to this incident, I will explain it in detail. After my wife was seated, the nurse unwound the passenger seat belt entirely and inserted the belt tongue into the buckle so that the lap part of the seat belt went properly around my wife’s lap. To protect the fresh surgical site from external forces, the nurse then placed the part of the seat belt that is normally worn across the chest BEHIND my wife’s back. Had the seat belt been placed properly across my wife’s chest, it would have been forced to pass over her left arm, which was tied to her body by the sling and bandages. It was thus not possible to wear the chest part of the seat belt properly over the chest but under the left arm. Lastly, the nurse allowed the fully extended seat belt to wind up onto the pretensioner. Upon arrival at home I wanted to take the seat belt off my wife. To this end I opened the passenger door, and gently pulled on the seat belt in order to slacken it enough to get the seat belt off her. However, I could not get any slack. Per instructions in the user manual, I opened the belt buckle but the belt was tightly wound around my wife's body. Ultimately, I had to cut the belt with scissors.

NHTSA ODI 11425042

The panoramic sunroof of the C300 is held in plastic hooks that break, even with normal use. So, that leaves the panoramic roof to fly off the vehicle on the highway. I have not opened my roof in three years because I am afraid it might not hold up. Looking at the MB owners' forum, it seems to be a pretty common issue that these plastic hooks break, and then the panoramic roof either doesn't close all the way, stay up to let the air come underneath it to introduce the risk of it flying away, or become really flappy when driving with open roof.

NHTSA ODI 11424353

On July the 8th I was driver on interstate highway 65south in Birmingham Alabama in my 2015 Mercedes c 300 when there was a loud thump which startled me and almost caused an accident what happened is the roof panel between the windshield and sunroof flew off it caused damage to my vehicle and almost an accident now when I contacted Mercedes they say that it is a recall out for this problem but they do not have a time as to when this can be fixed this will be a problem because now I am not able to drive my vehicle because there is a gape between the windshield and the roof where water and anything else will get into the vehicle this is terrible now I am without a car for who knows how long.

NHTSA ODI 11423964

In March of 2020 I was driving home from work. I stopped at a red light. When it turned green, I proceeded to step on the gas. My car started making noises and shaking as I drove. My check engine light came on. I was able to pull over without incident. My vehicle has under 48k miles on it! I had it towed to a Firestone facility by my house. They replaced spark plugs and ignition coil 1 and 2. They said it was still severely misfiring. Cylinder 1 must have internal damage and should be towed to the dealer. They gave me a spark plug they removed that had significant damage to the top part. They said something must have impacted it with significant force. I then had the vehicle towed to a Mercedes Benz Dealership. They said they inspected with a scope and found piston material missing, can see ring exposed and have damage to cylinder wall. Will need to replace engine, turbo charger, cat converter intake manifold to repair. They wanted $18k to repair. I did some research and found out that the 2015 Mercedes C class was the first year they switched from 6 cylinder to 4 cylinder turbo charge engine. These models have had a significant amount of engine problems and failures, the manufacturer is aware of. Many of these occurred in cylinder 1 along with wrist pins issues and others. I found my situation wasn't unique. I then filed a complaint with The BBB in Georgia. MBUSA offered me $3k towards the repair or purchase of a new vehicle. I declined the offer. I only wanted my vehicle repaired. I wasn't alone in this situation. These issues are easily found online. My vehicle has since been sitting in my driveway for almost a year and a half. I've been making my monthly car and insurance payments on a vehicle I can't drive. I recently went to the Mercedes dealership and they will give me $5k for the vehicle towards a trade, leaving me with $15k negative equity towards the purchase of a vehicle. Mercedes should stand behind their products and do the right thing

NHTSA ODI 11423487

Driving down the interstate and half of the stationary roof panel dislodged. Luckily no accidents occurred due to the malfunction. The other half is still loosely attached and I am worried it could cause an accident if it detaches . I have emailed and called headquarters as well as my local dealership and no one has the ability to fix the problem and cannot confirm if I choose to pay out of pocket, that I will be reimbursed. There is a recall and it’s #21V197. At this point I want some sort of solution so I can ensure the safety of myself and those driving around me.

NHTSA ODI 11423106

I was in middle line on I-5 SB San Diego doing 40-60MPH when my car suddenly started to shudder, shake and smoke came from the exhaust. The car lost power and the check-engine light came on right away. I was told that Cylinder 3 lost pressure, that the engine wall was damaged and that possibly the piston and wrist pin are cracked. My car has only 66K miles and the Mercedes Benz dealership is telling me that I need a new engine that will cost $19,000. After doing some research I have found out that I wasn't the only one with this issue. I have listed an example here: "HERE IS A MAJOR ISSUE WITH THE 2015 M274 MERCEDES ENGINE REGARDING THE WRIST PINS. MERCEDES HAS ISSUED NUMEROUS INTERNAL SERVICE BULLETINS ABOUT THE ISSUE. THE ENGINES WERE MANUFACTURED WITH WRIST PINS WITH TOO MUCH TOLERANCE THAT SLAP AGAINST THE PISTON WHEN OPERATING THAT COULD LEAD TO PREMATURE ENGINE FAILURES. THERE ARE HUNDREDS OF COMPLAINTS ON ONLINE FORUMS OF PREMATURE ENGINE FAILURES (PRE 100K MILES)." MBUSA requested from me proof that the car was serviced on time and with the correct parts. Once I was able to prove everything they told me that they were sorry but I still need to pay for everything. They did offer a "10% good-will discount". I wish they told me when I was buying a car that after every 6th oil change I will need a new engine. PLEASE MAKE MERCEDES MAKE THIS RIGHT AND FIX THE AFFECTED CARS THE RIGHT WAY.

NHTSA ODI 11422534

The contact owns a 2015 Mercedes Benz C300. The contact received notification of NHTSA Campaign Number: 21V197000 (STRUCTURE) however, the part to do the recall was unavailable. The contact stated on June 18, 2021, while driving 55 mph, the roof plastic panel detached and flew into oncoming traffic. The contact stated no one was injured. The contact called the local dealer and was informed that the part was not available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure. The failure mileage was approximately 59,000. VIN tool confirms part not available.

NHTSA ODI 11421712

Sunroof clips are snapping on many w205 2015 mercedes c300 models causing the panoramic roof to come loose potentially flying off the car while driving this has the potential to hurt many people. Mercedes claims there is only a recall for models up to 2011 however hundreds of thousands of later model vehicles have the same issue. I read an article saying they recently opened a recall for the later models but my vin isn’t covered. If the 100 pound panoramic roof flies off while driving on the highway at 70 mph it can definitely kill someone. Please address my concern I cannot afford to come out of pocket for Mercedes defect and lack of help.

NHTSA ODI 11421163

My daughter was driving at freeway speeds, when she heard, what we now know, is a portion of the sunroof panel flapping and break off. There was no warning, no instrument indication, and assume the broken part was a safety hazard to vehicles following. We took her vehicle to Fletcher Jones Mercedes in Newport Beach, but they're hesitating about repairing or reimbursing costs, due to the pending nature of the NHTSA Recall #21V197.

NHTSA ODI 11420411

Heavy fuel/gasoline smell around engine bay began approximately 2 years ago while the car was still under original 5 year warranty. Fuel smell would persist outside of the vehicle despite the vehicle not being driven for multiple days. When driven, fuel smell would permeate into the cabin of the vehicle and cause mild headaches to the occupants. Taken to dealer to find cause of smell and was advised that there was nothing wrong with the vehicle. Fuel smell continues to persist since it was originally noticed without change and vehicle is no longer within warranty period. Recently, this vehicle was taken back to the same dealer for servicing for an unrelated issue. Told the service representative that there was a fuel smell that continues to linger around the vehicle when parked and inside the cabin. This inspection revealed leaks from two fuel lines and technician recommended replacement. Warning lamps, messages, or other indicators from the car never appeared.

NHTSA ODI 11420341

Passenger side airbag light keeps coming on when someone is sitting in the car. My electrical system shuts off and on and goes haywire

NHTSA ODI 11418977

check engine light and check oil light came on in rush hour traffic in atlant during rush hour. Car started sputtering and finally made it to the shoulder of the interstate and oil was low on the dip stick. I added oil and a day later same thing. Took it to the dealer and cracked piston in #1 cylinder service guy said about 3 to 6 a day on this year benz.

NHTSA ODI 11418053

The contact owns a 2015 Mercedes-Benz C300. The contact stated that the sun roof ceased in the open position. The contact stated that the adhesive on the paneling had deteriorated which caused the sun roof to lose functionality. The vehicle was not taken to the local dealer. Upon investigation, the contact associated the failure with NHTSA Campaign Number: 21V197000 (STRUCTURE) however, the vin was not included. The manufacturer was informed of failure and informed the contact that the vehicle was not included in the recall. The failure mileage was approximately 61,000.

NHTSA ODI 11417891

THE CAR HAS INTERMITTENT STARTING ISSUES MORE NOTICEABLY DURING ECO START / STOP PROCESS. WHEN CAR DOES AN ECO STOP AT RED LIGHT OR STOP BUT IT IS UNABLE TO RESTART CONSISTENTLY (10-20% FAIL RATE). ALL DASHBOARD LIGHTS COME ON AND CAR IS STALLED. CAR CAN ROLL IF ON A HILL. CAR CAN BE RESTARTED BY TURNING CAR ON AND OFF MANUALLY. ONLY ERROR CODE IS P1CE200 BUT THE MANUFACTURER SUGGESTED STEPS DO NO SOLVE PROBLEM. BATTERY, AUXILLARY BATTERY, STARTER, VOLTAGE DIP LIMITER, BATTERY SENSOR, STARTER RELAY WERE REPLACED. DELEAR UNABLE TO FIND PROBLEM AND SAYS ALL SOFTWARE IS UP TO DATE.

NHTSA ODI 11416414

WHILE DRIVING MY 2015 MERCEDES BENZ C300 4MATIC WITH PANORAMIC ROOF ONE DAY ON RTE 9 IN HYDE PARK NY, A 2 LANE STATE ROAD I WAS TRAVELING AT 40 MPH, I SUDDENLY HEARD MORE AIR THAN USUAL AND THEN SECONDS LATER A LOUD FLAPPING NOISE ON ROOF. I PULLED OVER IMMEDIATELY ONLY TO FIND THE STATIONARY ROOF PANEL ALL THE WAY FORWARD ON THE ROOF, (DIRECTLY IN FRONT OF GLASS PORTION OF THE PANO ROOF) BECAME LOOSE ON ONE SIDE AND FLAPPED OPEN WITH WIND WHEN IN MOTION. I USED 3 QUARTERS BETWEEN WINDSHIELD AND SAID PANEL TO HOLD IT FROM POPPING UP WHILE DRIVING AND DROVE IMMEDIATELY TO A BODY SHOP. TBEY INSPECTED IT AND DETERMINED IT WAS HELD DOWN WITH BLACK EPOXY SIMILAR TO WHAT IS USED TO INSTALL GLASS SUCH AS WINDSHIELDS. THEY ADDED SOME EPOXY AND TAPED DOWN THE PIECE FOR ME. APPROXIMATELY ONE WEEK LATER I WAS TRAVELING ON THE SAME ROAD AT ABOUT 30MPH AND SUDDENLY ALL WITHIN LIKE 2 SECONDS HEARD LOUD WIND, THEN FLAPPING, THEN SAW THE ROOF PIECE FLY OFF SWING IN FRONT OFF WINDSHIELD IT WAS STILL ATTACHED TO A RUBBER GASKET, THEN UP IN THE AIR AND BACK DOWN AND SMACKED THE SIDE OF DRIVERS DOOR BEFORE BREAKING FREE AND FLYING DOWN THE ROAD BEHIND ME. LUCKILY IT DID NOT STRIKE ANY CARS OR PEOPLE AS IT BRIEFLY HELD ON TO THE GASKET ATTACHED. I IMMEDIATELY STOPPED AND WAS ABLE TO RETRIEVE IT, BROKEN INTO 2 PIECES. SOME ONLINE RESEARCH FOUND THIS HAS BEEN A VERY COMMON PROBLEM WITH MANY, MANY PEOPLE WHO POSTED ALL OVWR THE INTERNET ON FACEBOOK AND SEVERAL OTHER SITES. I THEN FOUND THE EXACT SAME PROBLEM, AND PART WAS RECALLED BY MERCEDES FOR 10S OF THOUSANDS IF CARS, BUT THE RECALL DID NOT INCLUDE MY YEAR (BUT DID INCLUDE MY MODEL FOR OTHER YEARS). THIS IS VERY OBVIOUSLY THE SAME EXACT PROBLEM AND SHOULD BE COVERED FOR ALL YEARS BY MERCEDES. I CALLED AND AFTER A LENGTHY PHONE CALL WITH MERCEDES BENZ I GOT NOWHERE. THE AGENT FOR MB REFUSED TO EVEN ADMIT IT WAS A RECALL, AND WAS RUDE.

NHTSA ODI 11414375

THE C300 4MATIC SPECIFICALLY SHOULD BE RECALLED BECAUSE SOMETHING NEAR THE FRONT END SQUEAKS AND MAKES ALL TYPES OF NOISES

NHTSA ODI 11405111

CHECK ENGINE LIGHT KEEPS COMING ON/ FOWL ORDER COMING FROM AC UNIT/ LOUD GAS SMELL WHEN START IGNITION IN THE MORNING

NHTSA ODI 11404560

TL* THE CONTACT OWNS A 2015 MERCEDES-BENZ C300. THE CONTACT STATED THAT THE VEHICLE WAS RECENTLY IN AN ACCIDENT. THE VEHICLE WAS REPAIRED AT GERBER COLLISION & GLASS (102 CORPORATE PARK DR, HENDERSON, NV 89074) HOWEVER, WHILE LEAVING THE COLLISION CENTER, THE CONTACT HEARD A LOUD KNOCKING SOUND COMING FROM UNDERNEATH THE VEHICLE. THE CONTACT ASKED THE COLLISION CENTER TO INSPECT THE VEHICLE FOR THE SOUND HOWEVER, THE COLLISION CENTER DECLINED. THE CONTACT THEN TOOK THE VEHICLE TO MERCEDES-BENZ OF HENDERSON SERVICE CENTER (925 AUTO SHOW DR, HENDERSON, NV 89014) TO BE INSPECTED. THE VEHICLE WAS NOT YET DIAGNOSED NOR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 55,321.

NHTSA ODI 11403557