2017 MERCEDES BENZ C 300

What owners reported to NHTSA, ranked by how often and how seriously.

This is complaint data, not a random sample.

It only includes owners who chose to file a federal complaint, so it over-represents dramatic and safety-related problems and under-represents minor issues an owner just had fixed without reporting. Read this as what NHTSA complainants report most, not as this vehicle's true failure rate. Full methodology.

Component ranking

  1. #1

    engine internal

    28 unsafe, 7 annoyance

    35
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=8)

    • "CAR STARTED TO VIBRATE AT IDLE THEN GRADUATED TO SHAKING AT ALL TIMES EVEN DURING ACCELERATION. ACCELERATION VERY SLOW, STUCK FEELING. BROUGHT TO MERCEDES AT 28K MILES. THEY STATED IT IS A CRACKED PISTON IN CYLINDER 1. THIS IS APPARENTLY A VERY COMMON ISSUE WI…"~28,000 mi, complaint #1682359
    • "The contact owns a 2017 Mercedes-Benz C300. The contact stated while driving 45-50 MPH, the vehicle stalled inadvertently and would not exceed 3 MPH. There was no warning light illuminated. The contact was unable to veer to the side of the roadway. The contact…"~29,650 mi, complaint #1845835
    • "PISTON 1 CRACKED AT 48,000 MILES. MB TOLD OWNER THAT THE ENGINE HAD TO BE REPLACED BUT WHEN FINDING OUT THAT THE WARRANTY WAS UP AT 50,000 THEY REPLACED THE PISTON INSTEAD. CAR IS STILL SHAKING AT IDLE AND ROUGH RIDE. ENGINE SHAKES AND JERKS."~48,000 mi, complaint #1674375
    • "2017 MERCEDES C300 COUPE 49,000 MILES. THIS CAR HAS BEEN TO THE SERVICE CENTER 10 TIMES FOR ENGINE PROBLEMS " VIBRATIING, JERKING, SHAKING AND TICKING" LAST VISIT AT HOEHN MERCEDES,. SERVICE TECH SAID THAT THESE ENGINES AUTOMATICALLY VIBRATE AND JERK AND THAT…"~48,000 mi, complaint #1681481
  2. #2

    fuel tank and lines

    14 unsafe, 4 annoyance

    18
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=7)

    • "A FUEL LINE IN THE ENGINE COMPARTMENT JUST ABOVE THE SKID PLATE ON THE DRIVES SIDE JUST RIGHT OF THE FRONT WHEEL WELL LEAKS FUEL WHERE THE LINE IS CRIMPED COMING FROM THE HIGH PRESSURE FUEL PUMP. FUEL COLLECTS ON THE SKID PLATE AND WHEN A STOP AT IDEA PRODUCES…"~47,000 mi, complaint #1726762
    • "TL* THE CONTACT OWNS A 2017 MERCEDES-BENZ C300. WHEN THE CONTACT STARTED THE VEHICLE WITH THE MOBILE APP, SHE NOTICED A FUEL ODOR EMITTING FROM THE VEHICLE. WHEN THE VEHICLE WAS STARTED MANUALLY, THE ODOR WAS NOT PRESENT. THE CONTACT TOOK THE VEHICLE TO PARK P…"~55,000 mi, complaint #1620056
    • "TL* THE CONTACT OWNS A 2017 MERCEDES BENZ C300. THE CONTACT STATED THAT WHILE THE HEATER WAS ACTIVATED, THERE WAS AN ABNORMAL FUEL ODOR COMING FROM THE VENTS INTO THE VEHICLE. THE VEHICLE WAS NOT TAKEN TO A DEALER OR MECHANIC TO BE DIAGNOSED. THE CONTACT STAT…"~55,000 mi, complaint #1713796
    • "The contact owns a 2017 Mercedes-Benz C300. While driving at approximately 15 mph, the contact observed smoke emanating from under the hood. The vehicle was driven to her work location and parked. Upon exiting the vehicle and opening the hood, she observed ora…"~65,422 mi, complaint #2206881
  3. #3

    sunroof

    14 unsafe, 2 annoyance

    16
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=8)

    • "TL* THE CONTACT OWNS A 2017 MERCEDES BENZ C300. THE CONTACT STATED THAT WHILE DRIVING 55 MPH AND WAS GOING AROUND A CURVE IN THE ROAD, AN ABNORMAL SOUND WAS HEARD. THE SUN ROOF EXPLODED WITHOUT IMPACT. THE CONTACT STATED THAT THE SUN ROOF GLASS FELL INSIDE THE…"~23,000 mi, complaint #1714726
    • "The contact owns a 2017 Mercedes-Benz C300. The contact received notification of NHTSA Campaign Number: 21V197000 (Structure) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount o…"~39,000 mi, complaint #1763979
    • "The contact owns 2017 Mercedes-Benz C300. The contact stated while driving 45 MPH, he heard air coming in through the OSI cover. Once the contact arrived at his destination, he noticed that the front sunroof panel had detached from the vehicle. The dealer was…"~40,000 mi, complaint #1850552
    • "The contact owns a 2017 Mercedes-Benz C300. The contact stated that she heard air entering the sunroof however, while attempting to close the sunroof, the sunroof failed to close as designed. There was no warning light illuminated. The vehicle was taken to the…"~56,000 mi, complaint #1836021
    • "The contact owns a 2017 Mercedes-Benz C300. The contact stated while driving 65 MPH, there was a loud banging sound coming from the roof of the vehicle, prior to the glass sunroof panel being ejected from the roof panel and landed on the roadway. The cause of…"~84,000 mi, complaint #2026396
  4. #4

    engine cooling

    2 stranded, 7 unsafe, 4 annoyance

    13
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "ON 7/30/18 I WAS STRANDED IN THE MIDDLE OF THE STREET AFTER THE COOLANT MALFUNCTION LIGHT CAME ON. THE CAR BEGAN OVERHEATING, AND THERE WAS NO AC. I WAITED FOR ROADSIDE ASSISTANCE MORE THAN 3 HOURS. I WAS INFORMED OF THE INCORRECT POSITIONING OF THE ALTERNATOR…"complaint #1560588
    • "My car threw the check engine code P052E, the issue is the positive crankcase ventilation valve being faulty. Incredibly common on this model and now failed on my car too at 60K miles. All maintenance was done up to this point with the dealer and at or before…"complaint #1838529
    • "Engine bay gets too much water whenever car wash has been done due to space between windshield and plastic engine bay shield (right hand side from vehicle driver seat) has slight gap. "complaint #1846625
    • "P052E positive crankcase ventilation regulatory valve Part number 274-090-17-29-80 "complaint #1885628
    • "Egine light on need to replace clogged Pcv value at 48,000 miles. Seems like this part needs a recall"complaint #1898287
  5. #5

    glass and windshield

    12 unsafe

    12
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=9)

    • "WINDSHIELD QUALITY DOES NOT MEET MY EXPECTATION. MY WINDSHIELD CRACKED WITHIN A COUPLE MONTHS BY A PIECE OF ROCK ON THE ROAD WHILE DRIVING ON FREEWAY."~2,500 mi, complaint #1421133
    • "MY WINDSHIELD CRACKED THE 2ND DAY I HAD THE VEHICLE. " SEPT 2017". I HAVE INFORMED THE MB MECHANIC SEVERAL TIMES AND HE DID NOTHING AFTER MANY FAILED ATTEMPTS WITH MERCEDES OF EL CAJON I ASKED TO BE PLACED WITH A NEW SERVICE ADVISOR. RECIEVED MY NEW WINDSHIEL…"~6,000 mi, complaint #1449366
    • "TL* THE CONTACT OWNS A 2017 MERCEDES-BENZ C300. WHILE DRIVING APPROXIMATELY 35 MPH, THE GLASS MOON ROOF SUDDENLY EXPLODED, CAUSING GLASS TO ENTER THE CABIN OF THE VEHICLE. THERE WERE NO INJURIES. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF LOVELAND ([REDACTED AD…"~9,000 mi, complaint #1455816
    • "The contact owns a 2017 Mercedes-Benz C300. The contact stated that while driving at approximately 75 MPH, a loud popping noise was heard and then the sunroof exploded. The contact stated that there were no injuries sustained from the glass shards that had fal…"~15,000 mi, complaint #1875429
    • "FRONT PANEL GLASS OF PANORAMIC SUNROOF FLEW OFF THE CAR AS I WAS DRIVING ON THE HIGHWAY."~43,000 mi, complaint #1735484
  6. #6

    other

    7 unsafe, 5 annoyance

    12
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=3)

    • "The contact owns a 2017 Mercedes-Benz C300. The contact stated while driving 75 MPH, the front roof panel located between the windshield and the panoramic sunroof detached and flew off the vehicle. The vehicle was taken to the dealer and the contact stated tha…"~41,700 mi, complaint #1912541
  7. #7

    evap system

    9 unsafe, 1 annoyance

    10
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "The contact owns a 2017Mercedes-Benz C300. The contact stated that upon having the vehicle inspected, the check engine warning light illuminated. The vehicle was diagnosed and produced code: P052E. The vehicle was then taken to an independent mechanic where it…"~53,000 mi, complaint #1923024
  8. #8

    seatbelt and pretensioner

    8 unsafe

    8
    incidents

    Commonly reported, insufficient mileage data - n=13, median 20,000 mi, no reliable range below 25 reports.

    • "TL* THE CONTACT OWNS A 2017 MERCEDES-BENZ C300. THE CONTACT STATED WHILE STARTING THE VEHICLE, THE FRONT SEAT BELT PRETENSIONER FAILED. UPON INVESTIGATION, THE CONTACT ASSOCIATED THE FAILURE WITH NHTSA CAMPAIGN NUMBER: 17V251000 (SEAT BELTS) HOWEVER, THE VIN W…"~20,000 mi, complaint #1718250
    • "The contact owns a 2017 Mercedes-Benz C300. The contact stated that the driver’s and passenger’s side front seat belts failed to retract completely upon release. Due to the failure, the seat belts would fall to the floor upon release from the buckle. The conta…"~20,000 mi, complaint #1758525
    • "REAR DRIVER SIDE SEAT BELT NOT LOCKING AND CAN NOT DEPRESS UNLOCKING BUTTON. DOESN'T LOCK BEFORE STARTING NOR AFTER CAR IS STARTED AND DRIVING. JUST PURCHASED CAR 4 MONTHS AGO BACK SEAT NEVER USED.*DT*JB"~22,000 mi, complaint #1717639
  9. #9

    airbag system

    6 unsafe

    6
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=8)

    • "TL* THE CONTACT OWNED A 2017 MERCEDES-BENZ C300. WHILE AT A STOP LIGHT, THE CONTACT'S VEHICLE WAS INVOLVED IN AN HEAD ON COLLISION. THE DRIVER'S AIR BAG DEPLOYED, BUT NOT TO FULL CAPACITY. THE CONTACT SUSTAINED HEAD AND NECK INJURIES THAT REQUIRED MEDICAL ATTE…"~14,000 mi, complaint #1535123
    • "I HIT A BEAR IN MONTANA IN MY 2017 MERCEDES C300 AT 86MPH AND DESTROYED THE FRONT OF MY CAR. THE SEATBELTS DEPLOYED AND WRENCHED US INTO OUR SEATS AND SMOKE CAME OUT OF THE FRONT AIR VENTS BUT THE AIRBAGS DID NOT GO OFF. ON THE DASH THE VEHICLES STATED THAT TH…"~17,000 mi, complaint #1483804
  10. #10

    engine oil consumption

    5 unsafe

    5
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "P06DA00 CODE oil pump vale circuit open"complaint #1812366
    • "Most M274 engines have P06DA00 fault code internally. Harness for oil pressure regulating solenoid valve is short/open inside the engine oil pan. It can cause excessive oil pressure and premature oil pump failure. As the broken wire is sunken in the engine oil…"complaint #1858980
    • "Check engine light code " P052E71" Crankcase Ventilation Valve Replacement is needed. There is a defective part oil separator and the valve is stuck. Must replace the whole assembly with the hoses. (Part is available for inspection). The problem has been con…"complaint #1864306
    • "Car check engine light came on with only 62,000 miles. Diagnosed as code P052E, the issue is the positive crankcase ventilation valve being faulty. Regular oil changes and maintenance was done. I see multiple complaints with this issue, why is this not recalle…"complaint #2006549
    • "Keep getting a code P052E! Changed the oil and code went away for a few days then came back. Looked into getting it fixed and it seems like Mercedes has known about this issue and hasn’t called for a recall on this piece of equipment! Very costly to fix and sa…"complaint #2017745
  11. #11

    engine stall or no start

    5 unsafe

    5
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=6)

    • "WHEN IDLING AT THE LIGHT. THE CAR WOULD SHUT ITSELF OFF. ALL THE WARNING LIGHTS WILL COME ON. I THEN HAVE TO RESTART THE CAR WITH THE PUSH START TO RESET IT. THEN IT'LL WORK FINE. I HAVE BEEN TO MERCEDES DEALERSHIP IN NEW ROCHELLE FOR FOUR TIMES ABOUT THIS ISS…"~29,000 mi, complaint #1559031
    • "WHEN THE CAR IS IN THE A FEATURE, WHERE IT TURNS ON AND OFF WHEN NOT IN MOTION, IT GETS STUCK IN THAT MODE AS IF A MAGNET IS HOLDING IT IN THAT POSITION. IT WILL NOT MOVE, IT STALLS. I TURN IT OFF AND TURN IT BACK ON AND SOMETIMES IT STILL WILL NOT MOVE, SOMET…"~36,000 mi, complaint #1733403
  12. #12

    control module

    3 unsafe, 1 annoyance

    4
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Code P052E costing me over $2500 to repair. I’m not the only one dealing with this problem and my car only has 58k miles and it’s a 2017. Should be recalled considering the part being defective. "complaint #1879432
    • "My car is throwing the error code P052E. It keeps going on and off. "complaint #1899070
    • "When i scan my vehicle there are Mercedes Benz fault codes pertaining to the electrical system but also recalls that haven’t been done but when looking Mercedes Benz web site and NHTSA WEBSITE these are aren’t showing up as my particular chassis being include…"complaint #2035096
    • "Check engine light for P052E which has been coming and going off for years now. Now the check engine light is there permanently. I spoke to Mercedes Benz customer service and requested for them to fix the problem now that the light is on permanently but they r…"complaint #2188739
  13. #13

    power steering hydraulic

    4 unsafe

    4
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=5)

    • "POWER STEERING FAILED WHILE DRIVING NEARLY CAUSING A MULTI CAR ACCIDENT."~3,000 mi, complaint #1538569
    • "PROBLEM "POWER STEERING MALFUNCTION" . FRIST TIME OF THIS HAPPENED WAS FROM MAY 17, 2018,THE STEERING WHEEL CANNOT MOVE WHEN THE VEHICLE WAS START UP. SECOND TIME IS TODAY,OCT 16,2018. WHEN I START UP THE CAT, "POWER STEERING MALFUNCTION" COME UP ON SCREEN.…"~9,190 mi, complaint #1507093
    • "SO I JUST GOT MY MERCEDES BENZ C300 4MATIC I ONLY HAVE 44,711 MILES ON IT AND I BARELY DRIVE IT, SO TODAY I WAS DRIVING AND THE WHOLE DAY THINGS WERE GREAT AND I STOPPED AT A STORE GOT BACK IN AND IT SAYS 'POWER STEERING MALFUNCTION' I WAS ON A STREET IN THE C…"~44,771 mi, complaint #1745979
  14. #14

    software or update

    2 unsafe, 1 annoyance

    3
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "VIN: [XXX] YEAR: 2017 MAKE: MERCEDES-BENZ MODEL: C300W NHTSA RECALL NUMBER: 21V058 RECALL DATE: FEBRUARY 26, 2021 MANUFACTURER RECALL NUMBER: 2021030015 HI MY NAME IS [XXX]. I'M HERE TO COMPLAINT ABOUT MY DEALER DIDN'T NOT HELP ME FOR RECALL. MY RECALL…"complaint #1745361
    • "I’m trying to ship my car back to the United States and there is a valid recall on my car which I have taken it to the dealership in Korea, which is where I’m currently at, and I cannot get me car updated either because they don’t understand the paper or becau…"complaint #1807543
    • "ESP control unit software Recall 2016090002 Recall 2017110002 Recall 2020080016 And my car shows there’s cero recall active but is giving me problem showing code: U0121 u1110 U0122 B227d U0423 B227d "complaint #2082561
  15. #15

    steering electric assist

    3 unsafe

    3
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=3)

    • "The contact owns a 2017 Mercedes-Benz C300. The contact stated that while driving at various speeds and attempting to make a turn, the steering wheel was significantly difficult to turn. The contact stated that he was able to drive the vehicle however, an extr…"~65,000 mi, complaint #1830809
  16. #16

    brake pads and rotors

    1 unsafe, 1 annoyance

    2
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "11 MONTHS OLD CAR AND AROUND 3,000 MILES - CHECK BRAKE PAD WARNING WENT OFF. WILL TAKE THE CAR TO THE DEALER TO FIX THE ISSUE."~3,000 mi, complaint #1434440
  17. #17

    tire failure

    1 unsafe, 1 annoyance

    2
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "I HAVE LEASED A CAR FROM THE TORRANCE MBZ ON PACIFIC COAST HIGHWAY. I HAVE HAD THIS CAR FOR ABOUT A YEAR AND A HALF AND I HAVE 12K MILEAGE ON THIS CAR. LAST WEEK I NOTICED THAT MY FRONT TIRES TREADS ARE WEARING OUT AND THEY ARE BECOMING FLAT. THEY ARE ORIGI…"complaint #1425964
    • "After approx 24,000 miles and 18 months, I was told all four tires needed to be replaced and were down to between 3/32nd and 2/32nd tread left on all four tires, despite regular rotations, alignment, and overall car maintenance. These were purchased at Mavis…"complaint #1958269
  18. #18

    ac compressor and refrigerant

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "My car caught on fire due to AC malfunction "complaint #2112008
  19. #19

    adas collision warning

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Light came on tonight and stayed on, Collinsion prevention assist inoperable. Car has been involved in any collision for this system to quit out of the blue "complaint #1764272
  20. #20

    battery and charging

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "THE 2017 MERCEDES-BENZ C300 VEHICLE SUFFERED A COMPLETE LOSS OF POWER/ELECTRICS WHILE IN MOTION AT SPEED AND IN TRAFFIC, CAUSING THE VEHICLE TO UNEXPECTEDLY STOP ON TWO SEPARATE OCCASIONS. THE LOSS OF ALL ELECTRICAL SUPPLY LEAVES THE VEHICLE IMMOBILE, WITHOUT…"~20,000 mi, complaint #1623558
  21. #21

    emissions aftertreatment

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Error code P052E71 on a 2017 c300 with 100k miles. It seems to be a very common and recurring issue that appears to have no real solution and is costing consumers thousands upon thousands. This malfunction does relate to emissions and this vehicle is operated…"complaint #2055407
  22. #22

    exhaust system

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "EXHAUST WAS COMING INTO THE CAR FOR MONTH. WHEN I STARTED THE CAR TO LET IT WARM UP IN WINTER MONTHS, I WOULD GET IN AND WONDER WHY I SMELLED GAS OR FUMES. FIGURED IT WAS FROM SITTING. NO DASHBOARD LIGHTS CAME ON, NO C02 SENSORS IF THERE ARE ANY, NOTHING CAME…"~15,555 mi, complaint #1636319
  23. #23

    fuel injector

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "During cold starts the fuel injectors/clamps leak causing strong gasoline smell inside the cabin. After research online this is a common issue with W205 systems. I am beyond surprised this has not been investigated and reported as a safety recall as it can pos…"complaint #1959956
  24. #24

    horn

    1 annoyance

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "VEHICLE HORN WILL NOT FUNCTION WHEN IGNITION SWITCH IS IN OFF POSITION."~8,000 mi, complaint #1354009
  25. #25

    interior trim

    1 annoyance

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Sunroof Front Trim for Mercedes-Benz GLC300 IS ALL SCRATCHED BUT MERCEDES BENZ SAYS IT IS NOT COVERED BY THEM."complaint #2135103
  26. #26

    key fob and immobilizer

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "SINCE I BOUGHT IN FEBRUARY 2017 BRAND NEW 2017 MERCEDES BENZ C300 CONVERTIBLE IN ONE YEAR OF OWNERSHIP I HAD TO BRING MY CAR SEVERAL TIMES FOR SERVICES LIKE, THE CONVERTIBLE TOP WOULD NOT WORK, THE MIRRORS WOULD NOT FOLD, THE STEERING WHEEL WOULD NOT ADJUST, E…"complaint #1464525
  27. #27

    paint and clearcoat

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Panel between front windshield and sun/moon roof was vibrating loose as well as the clear coat completely peeling off the piece. The car is only at 57k miles so this should NOT be occurring. That piece felt like it will fly off while driving. Unsafe."complaint #1980770
  28. #28

    stability and traction control

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "When I started my car, the dash did not reveal park, drive, or reverse. It illuminated with a warning light indicating an Electronic Stability Problem (ESP). Research revealed this to be an important safety feature and that the Mercedes-warning-lights-electri…"complaint #1849550
  29. #29

    starter

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "The same part that was recalled the Starter Current Limiter has overheated again. The dealership is trying to charge for this same part for diagnostic, parts and labor. The car produces smoke around the battery and melted due to overheating. The battery is…"complaint #2018364
  30. #30

    steering rack mechanical

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "While driving on the freeway car pool lane with my wife, a sudden vibration in the front tires was observed, the car felt like it was pushed to the right then to the left even though it was in the center of the lane. Told my wife, "something is wrong with the…"complaint #1964853
  31. #31

    suspension arms and bushings

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "In October 2024, the rear subframe was replaced due to rust perforation in the area of the suspension arm mounting bracket. I had no warning. The car was in for routine service at Mercedes Benz of New London. It had rusted from the inside out and was consid…"complaint #2114768
  32. #32

    timing belt or chain

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "I am reporting a serious vehicle safety hazard caused by improper and unsafe repair work performed by USA Platinum Motor, located at [REDACTED ADDRESS] #126B, Arlington, TX. I brought my 2017 Mercedes-Benz C300 in for a cold start rattle with no warning lights…"complaint #2144357
  33. #33

    transmission automatic

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "WHEN THE CAR IS NOT MOVING AND YOU ARE READY TO LEAVE THE CAR YOU PRESS THE POWER BUTTON TO TURN IT OFF, THE CAR "SOMETIMES" GOES INTO NEUTRAL NOT PARK AND STARTS MOVING WHEN YOU ARE GETTING READY TO EXIT THE VEHICLE, EVEN KNOWING THAT IT DOES HAVE A BUTTON FO…"complaint #1465788
  34. #34

    unintended acceleration

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=3)

    • "SUDDEN ACCELERATION AFTER PULLING VERY SLOWLY INTO PARKING SPACE. ALMOST STOPPED. CAR SUDDENLY ACCELERATED, JUMPED A CURB FROM, WENT UP AN EMBANKMENT AND HIT A TREE. WAS ABLE TO REVERSE AND BACK DOWN. IT WILL TAKE A MONTH FOR BODY WORK. NOTIFIED MERCEDES DEA…"~8,000 mi, complaint #1625074
  35. #35

    wheel or rim

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Factory AMG rims. 3 of the 4 rims have cracked. The last rim cracked with brand new tires. So it is not a tire issue. I find it unbelievable looking online how may others have had this problem with AMG rims. Does not seem acceptable. "complaint #1938035
  36. #36

    wiring harness

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "TL* THE CONTACT OWNED A 2017 MERCEDES-BENZ C300C. THE CONTACT STATED THAT WHILE THE VEHICLE WAS PARKED, THEY WERE INFORMED THAT THEIR VEHICLE WAS ON FIRE. THE VEHICLE'S CONSOLE HAD CAUGHT ON FIRE. THE CONTACT STATED THE FIRE DEPARTMENT HAD PUT OUT THE FIRE. TH…"~53,000 mi, complaint #1705260

NHTSA investigations

Search NHTSA's own recall and complaint database for MERCEDES BENZ C 300 directly.