Mercedes-Benz C-Class Complaints

3,817 consumer complaints on file.

#11696497October 30, 2025
STRUCTURE:BODY, ELECTRICAL SYSTEM, ENGINE
I am reporting a serious vehicle safety hazard caused by improper and unsafe repair work performed by USA Platinum Motor, located at 1221 California Lane #126B, Arlington, TX. I brought my 2017 Mercedes-Benz C300 in for a cold start rattle with no warning lights or prior issues. The shop diagnosed a loose timing chain and I authorized the repair. After the repairs, the vehicle was returned with critical safety defects, including a loose fuel pump, unsecured fuel line, missing bolts, and improperly reassembled engine components. Shortly after pickup, the car experienced loss of acceleration on the interstate, a strong odor of fuel, and a sudden loss of power, creating a dangerous and life-threatening situation. The vehicle had to be towed back to the shop. The manager, who is not a certified mechanic, admitted he personally “fixed” the issue by tightening the fuel pump himself. A Mercedes-Benz diagnostic inspection later confirmed multiple severe assembly errors, including missing fasteners, unsecured oil cooler, disconnected vent lines, and other safety-related defects in the fuel and cooling systems. These unsafe and negligent repairs created an extreme fire hazard, engine instability, and risk of sudden failure while driving. I am requesting a formal NHTSA investigation into this matter to ensure vehicle safety compliance and to prevent similar incidents affecting other consumers.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696593October 30, 2025
AIR BAGS
I had just gotten off the highway it was a rainy day and pulled into my driveway when airbag deployed on its own. I am lucky to be alive. I purchased this vehicle about 2 yrs or so ago and ran carfax that showed recall was fixed by manufacturer. I contacted Mercedes corporate office and it’s been almost two weeks with me calling and emailing w no call backs or any resolution. I don’t have a car and could have been seriously injured. Please help.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696650October 30, 2025
SUSPENSION, POWER TRAIN
Rear subframe completely rusted out. While driving on the hwy I heard a loud noise, a couple minutes later I hit the brakes to slow down to get off my exit and after pressing the brakes the car instantly fishtailed sending me sideways across 2 lanes of traffic. Luckily no one was injured or killed. I’ve seen that the car manufacturer was replacing this issue on models 2008-2015. My vehicle is a 2015 and they are telling me my vehicle is not covered for the issue. The car is not drivable and Mercedes needs to be held accountable. A critical component such as rear subframe completely rusting out in just under 10 years is unheard of and I can’t afford to pay 10k to fix it. Please help
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696118October 28, 2025
FUEL SYSTEM, GASOLINE
The contact owns a 2012 Mercedes-Benz C300. The contact stated the fuel tank was emitting a fuel odor. The contact stated that the fuel odor was extremely strong and could be smelled inside the residence while the vehicle was parked in the garage. There were no warning lights illuminated. The vehicle was taken to a Certified Mechanic, who diagnosed that the leak was coming from the top of the fuel tank; however, the mechanic was unable to specify the cause. The vehicle was towed to the dealer, but the vehicle was not diagnosed. The vehicle was not repaired. The contact became aware of NHTSA Campaign Number: 12V557000 ( Fuel System, Gasoline) online; however, the VIN was not included. The manufacturer was informed of the failure and informed the contact that the VIN was not under recall. The failure mileage was approximately 98,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11695702October 26, 2025
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
I purchased this 2020 Mercedes-Benz C300 only two months ago and have driven it less than 3,000 miles. The Carfax report shows consistent maintenance and regular service history by prior owners. While driving, the check engine light came on and the vehicle began shaking and running roughly. Diagnostics by Peachtree Imports (10/03/2025) and later by Mercedes-Benz of Atlanta South confirmed Cylinder #2 failure on the M264 2.0L engine at only 26,589 miles. The dealer’s report states: “Cylinder #2 mixture formation out of spec. Fault occurred due to worn exhaust valve seat. Cylinder head replacement required.” Estimated repair cost: $10,470.66. This causes misfire, loss of power, and unsafe drivability. The failure matches Mercedes-Benz Technical Service Bulletin LI01.30-P-072328 (2021), which documents valve-seat leakage in M264 engines requiring head replacement. The vehicle is outside warranty but has extremely low mileage, and MBUSA Case #18392667 remains unresolved. It is also important to note that the M260 engine, which is mechanically identical to the M264 but mounted transversely, has already received a warranty extension from Mercedes-Benz for the same cylinder-head and valve-seat defect. This indicates a systemic issue across both engine families, presenting a safety risk of sudden power loss or engine stall during operation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11695579October 25, 2025
SERVICE BRAKES
Car was Off and parked when brake line failed. Further inspection was able to identify that brake pipes was slowly corroded thought entire lower part of the brake system causing critical failure of brakes. Extreme safety issue due to the material of metal/coating and position of brake pipping. If operator was not observant, operator/driver would not have any braking and could cause harm.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11695491October 24, 2025
STRUCTURE:BODY:DOOR:HANDLE:INTERIOR
Vehicle Information: Year: 2013 Make: Mercedes-Benz Model: C300 (4MATIC) Approximate Mileage: 126,026 Component: Latches/Locks/Linkages – Interior Door Handle Summary of Issue: On October 10, 2025, the interior driver-side door handle on my 2013 Mercedes-Benz C300 broke, making it impossible to open the driver’s door from the inside. The handle broke through normal use upon trying to open the car door from the drivers side. The only way to exit the vehicle now is to roll down the window and reach around to use the exterior handle. On October 14, 2025, I spoke to two Mercedes-Benz dealerships in my area. They both confirmed this is a recurring problem on this model but stated there is no recall. One of them physically inspected the vehicle door problem. I believe the actual broken replacement part costs about $50. However, according to these same authorized Mercedes Benz repair shops I spoke to, Mercedes-Benz REQUIRES replacing the entire door panel assembly, which costs between $950 and $1,480 in labor and parts. This is not a reasonable or safe solution for such a critical component. This poses a serious safety hazard. In the event of a fire, collision, electrical failure, or if the windows become inoperable, the driver (myself) could become trapped inside the vehicle, leading to potential injury or death! I strongly urge the NHTSA to investigate this recurring defect, as it directly affects occupant safety and the ability to exit the vehicle in an emergency. Universal Imports, Rochester, NY – Inspected and confirmed recurring problem, no recall, verbal repair estimate $950, and Mercedes‑Benz of Rochester (West Herr Automotive), NY] – Confirmed recurring problem, verbal repair estimate $1480 Requested Action: Please investigate whether this defect warrants a safety recall or mandatory manufacturer repair campaign. The interior door handle failure on Mercedes-Benz C-Class vehicles represents a clear safety risk to occupants.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11695279October 23, 2025
STRUCTURE:BODY
I’m the owner of a Mercedes Benz C- Class Sedan 2015. My Rear Sub Frame Rusted Through at The right trailing arm - Fails state inspection. Mercedes Benz has issued a extended 20 year warranty on all vehicles from 2008 - 2015 C - Class Sedan for Rear Sub Frame that rusted out. Mercedes Benz service advisor stated that my vehicle was not under that extended warranty when he run my vehicle Vin number. My vehicle should be under that warranty, I have the same problem with the same vehicles on the list. Please help. Thank you
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11695341October 23, 2025
STRUCTURE:BODY
This is the same as recall for NHTSA ID: 21V-197. The panel flew off my 2017 Mercedes C300 W205. My vin number is not included in the recall. This is a safety issue and will need to be replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11695170October 23, 2025
ENGINE
My vehicle only had 31,000 miles and I experienced engine failure. I bought a new engine for 16, 500. 00 dollars. Mercedes Benz did nothing. I almost got in to several accidents because the engine completely stop on the interstate. Almost got hit by several cars. This is unacceptable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11694990October 22, 2025
FUEL SYSTEM, GASOLINE
The contact owns a 2016 Mercedes-Benz C300. The contact stated that while driving at an undisclosed speed, the contact smelled a gasoline odor in the interior of the vehicle. No warning lights were illuminated. The vehicle was taken to the dealer, who determined that the fuel hose downstream of the fuel pump was leaking. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 18V837000 (Fuel System, Gasoline); but the VIN was not included. The manufacturer was notified of the failure but provided no assistance. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693851October 16, 2025
COMMUNICATION: AUTO CRASH NOTIFICATION, ELECTRICAL SYSTEM:SOFTWARE
See attached document for complaint.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693928October 16, 2025
STRUCTURE:BODY
Sunroof detachment Sunroof fell off while driving
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11692765October 11, 2025
ELECTRICAL SYSTEM, ENGINE, VEHICLE SPEED CONTROL
On Friday [XXX] at approximately [XXX]. My wife and I were driving our 2024 C-Class 300 (~8,000 miles on this vehicle) on [XXX] and entering the intersection of [XXX]. Riverside, CA 92506 when all of sudden the car just died (the engine stopped running, pushing the gas pedal with no power) and all the dashboard lights came on flashing like crazy. This incident paced my wife and I in a very venerable bad not safe situation. If there was any traffic at in this intersection at that moment it would have been a bad situation. I called MB Walter's they could hear the sounds which were loud and they ask me to open and close the doors to see if sound would stop and wait 5 minutes and try to restart. Waited 5 minutes car started and we drove it to Walter's. The week before I had it back in the service department because the finger print function was not working any longer. They supposedly replaced the software package and then this major issue happen. The service department at Walter's has tried at least two times to download a new software package however this vehicle is not allowing it to accept it. They said engineers from the East coast were trying to help but nothing has been accomplished. It is becoming frustrating and allowing the overall safety concern has been increasing for my wife and I. What if this happens again and we are on the freeway or a street with traffic which both situations could cause a severe accident and harm. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11692113October 8, 2025
UNKNOWN OR OTHER
Rearview Camera is not displayed when the vehicle is placed in reverse. The display shows a black screen. A Recall Notice has been published for other vehicles of the same year, make, and model. The failure of the Rearview Camera results in safety risks during normal use of the vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11691568October 6, 2025
FUEL/PROPULSION SYSTEM
While driving car on Sunday 10/5, it suddenly failed to respond to gas pedal pressure. The car stopped accelerating and rather slowed to 15 MPH, almost causing a car from behind to hit me in the rear side.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11691716October 6, 2025
STRUCTURE:BODY
I was driving on the hwy 94 in Minneapolis and I had the cap to my sunroof fly off on the freeway. There’s a recall out on the sale vehicle but 4matic but not on my vin number. This is a huge safety issue and it’s been happening to quite a few people I know. No one was injured and it didn’t cause damage to any other vehicle but when I brought it into the shop they said the recall that was on this part was not for my exact vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11691362October 4, 2025
ENGINE, ELECTRICAL SYSTEM, UNKNOWN OR OTHER
I am writing to formally report an ongoing issue and safety concern with my vehicle. Since the day I purchased the car, I have experienced numerous mechanical problems and have spent a significant amount of money on repairs. In August, I had to take my vehicle to a local repair shop three times due to persistent issues. The car was also towed by AAA three separate times for safety reasons. My main concern is that the vehicle hesitates during acceleration and feels sluggish while driving, which creates a serious safety risk on the road. I contacted Mercedes-Benz and filed a claim regarding this issue; however, I have not received any meaningful assistance or resolution. I am requesting that this matter be re-evaluated and properly addressed as soon as possible, as my safety and the reliability of the vehicle are at risk. Please confirm receipt of this message and advise me on the next steps or any documentation needed to proceed with my claim. Thank you for your prompt attention to this matter. [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11690472September 30, 2025
UNKNOWN OR OTHER
Sunroof Front Trim for Mercedes-Benz GLC300 IS ALL SCRATCHED BUT MERCEDES BENZ SAYS IT IS NOT COVERED BY THEM.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11690125September 27, 2025
SERVICE BRAKES, ENGINE
I was coming off the freeway on 9/25/25, and when I pressed on the breaks they completely locked up and would not break at all. The car turned off, no warning lights nothing, and I continued to hit the break and the car would not stop, then all of a sudden it came to a stop almost colliding within inches of hitting the Semi-Truck in front of me. This is the second time in one year that this has happened to me, I have had the car checked out the first time last year immediately, and even paid to diagnose it, nothing, I had the brakes and rotors replaced last June of 2024 when this happened. Since then the car has only been in the dealership to get the car Fully checked out mutltiple times within 2024, 2025 and repaired by Mercedes dealership. On 9/25/25 this happened to me and it was a traumatic experiance when I pressed the break and the break got super hard and in a Locked position and would not come to a stop, there was no warning lights, no engine lights, nothing. (increased braking effort, and potentially I was inches of collision risk. I had the car towed to the nearest shop and was told this is a collapsed break booster Vacuum pump, and possibly the hose and lines and possibly further problems but they would need to replace the Vacuum pump first. After I looked to see if there was a recall on the vacuum pumps in that model on google and it says the following; Google- 2014 Mercedes c250 recall on Vacuum pump A-Premium Vacuum Pump Compatible With Select Mercedes ...Yes, there was a recall on certain Mercedes-Benz vehicles, including some 2014 C250 models, related to a defective brake booster vacuum hose. The recall involves hoses that may delaminate over time, leading to a loss of vacuum, increased braking effort, and potentially a collision risk. To check if your specific 2014 C250 is affected by this recall, you should contact an authorized Mercedes-Benz dealer or visit the Mercedes-Benz USA website to check for open recalls for your vehicle's VIN.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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