Mercedes-Benz C-Class Complaints

3,817 consumer complaints on file.

#11559554December 11, 2023
FUEL/PROPULSION SYSTEM
code p052e came on randomly.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11559292December 9, 2023
STRUCTURE:BODY
The glass panel between the top of the windshield and the front of the glass sunroof suddenly detached from the car. I was driving on the I-5 freeway at 70mph when the panel detached without warning. By the time I had safely pulled over I could not safely walk back to see if I could find the panel. The freeway was busy, I do not know if the panel struck another vehicle. It looks like the adhesive that holds the panel on has failed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11559315December 9, 2023
ENGINE
My car is registering code P052E71. The diagnosis says the valve for crankcase ventilation has a malfunction. The actuator is blocked. This is a common problem for this car with research. Some people have had to replace this part multiple times for their Mercedes which is a part that shouldn't fail. Nothing has been done such as a recall on this vehicle. The part and labor to repair this issue costs $1000+ dollars. Something should be done to help consumers. I'm doing my part to report this hoping something will be done.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11559107December 8, 2023
FUEL SYSTEM, GASOLINE
The contact owns a 2019 Mercedes-Benz C300. The contact stated that the vehicle would shut off soon after being cold started with several unknown warning lights illuminated. The vehicle was towed to the dealer where a diagnostic test was performed. The diagnostic test showed that the fuel pump was defective and needed to be replaced. The contact drove the vehicle for a few days after the diagnostic test but experienced the failure a second time. The vehicle was then towed to an independent mechanic for a second opinion where the contact was given the same diagnostic result; however, the contact was informed that the vehicle was included in NHTSA Campaign Number: 21V961000 (Fuel System, Gasoline). The contact went back to the dealer but was informed that the vehicle was not included in the recall. The manufacturer was notified of the failure and was referred to the NHTSA Hotline for assistance. The vehicle was not repaired. The failure mileage was 25,751
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11559164December 8, 2023
FUEL/PROPULSION SYSTEM
Mercedes Benz Selma, Texas Dearlership refuses to service known issue with fuel system leaks on C300 because they cannot reproduce problem. Problem is that don't have the correct environment to test for this know problem. “There is a short rubber fuel line/hose in the engine compartment that is attached with compression clamps; the hose connects the fuel line from the gas tank to the high pressure fuel pump. When it gets cold outside (below ~40 degrees Fahrenheit) the clamps loosen a bit and the hose will leak gas. This is what you will smell in the cabin. Once it gets warmer outside or the engine bay warms up, the smell will tend to go away. No clue how they've gone all this time without a safety recall, but I did make a report to the NHTSB last month when it started happening to me.” The fix is to have the rubber line w/clamps replaced. If you still have warranty the dealer can take care of it. (Provided they are configured to test for this defect properly which they are not. Bottom line, fuel leaks in garages like mine with a gas water heater are a BIG issue. I alerted the dealership that they and MB would be liable if something were to happen since they refused to repair vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11559214December 8, 2023
STEERING, SERVICE BRAKES
On Tuesday, the steering wheel failed to operate while making a left turn. While making a left turn the steering wheel locked and the brakes did not function to stop the vehicle. The vehicle continued to steer to the left and I almost hit another vehicle head on. What stopped my vehicle was the emergency brake system activated by almost hitting the other vehicle head on. They luckily saw me head on and tried to quickly move out the way. This happened two times the second time Thursday, there was a school bus to the left of me my car. I was not making a left turn but on a road that the curve went left and the steering wheel locked in that position. My wheel was locked and failed to stop for about 45 seconds with no car in front to trigger the emergency brakes. Immediately to my left was a school bus. The school Bus was not expecting my vehicle to cut them off in this manor, the bus had to make a hard stop to not crash into me. I feel my life and the life of the individuals in the other vehicle and school bus were all put at risk. I towed my car to the dealer and was advised that they did not see any recalls for my vehicle. They also advised me that based on the inspection and the incident details that they would need to replace the steering rack and pinion. My vehicle was operating as it normally did and did not have any system warning prior.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11558978December 7, 2023
UNKNOWN OR OTHER
Panoramic roof suddenly shattered while driving on a clear day.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11559001December 7, 2023
STRUCTURE:BODY, SUSPENSION
I have a 2015 Mercedes-Benz C300 4Matic got a letter from the company car had few recalls to address. Dropped the at Mercedes-Benz Hampton VA dealership on 12/06/2023 at 8:30 AM EST. After few hours got a call from the dealership that rear subframe of the has bad corrosion and because of the rust it got holes in it which is a bad safety risk. Risk is so great that it cant pass Virginia state inspection. I did a good online research and found it is a common issue in Mercedes-Benz vehicles and the company issued safety recall on some years and models but not on all the affected vehicles. Like my car has the exact same safety issue rear subframe got rust from inside so it was hard to notice till it became unsafe to drive the car. The dealer is asking almost $5000.00 to replace it. The Mercedes-Benz customer support center is unable to explain why some cars are covered with extended warranty offered by the factory and some doesn't for exact same issue. There are bunch of more people with same complaint but they don't know where to go.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11558631December 5, 2023
ENGINE, FUEL/PROPULSION SYSTEM
Emissions Failure P052E - Positive Crankcase Ventilation Regulator Valve Performance. Vehicle has been inspected. Warning lamp appeared for my engine recently. Cause by faulty plastic valves that requires a significant costly repair - around $3,000 USD
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11558037December 2, 2023
ENGINE
My vehicle started shaking and the check engine light came on. It's a PCV valve
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11558041December 2, 2023
ENGINE
Pcv valve broke and it emits all sorts of poisonous gases to the cabin!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11558051December 2, 2023
AIR BAGS, UNKNOWN OR OTHER, VISIBILITY:WINDSHIELD
The glue that suppose to make sure my windshield is secure is no longer secure. The windshield moves as I am driving. It’s only on the corner of the driver side. Everything else is secured. Also my airbags (passenger and driver). There is a recall but its not showing when I run the Vin # .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11557344November 28, 2023
SUSPENSION
The rear subframe is cracked. This puts myself at risk and others if vehicle is involved in an accident. The problem has been confirmed by two independent service dealers. The vehicle has only been inspected by independent dealers. No warning lights.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11555944November 19, 2023
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
The above multiple problems/parts at issue. To include Other/I am not sure. Started at or approximately February 2023. The (Automatic Folding Side View Folding Mirrors before resolution) Malfunctioned 3 separate times before being fixed. During that time the (Cooling System Malfunction Reduced Drive Performance Service Required), displayed 2 separate Unknown Dates on the Dashboard Screen. The MB Dealership Service Diagnostic Check made was not Able to Detect the Trouble and was Never Fixed). On Monday, 08/21/2023, by (USPS) delivered a Mercedes Benz Official Letter Head Dated August 2023, stating that an (IMPORTANT SAFETY RECALL) for my Make and Model was issued. For the (Fuel Pump Impeller Module & Unfortunately, the Remedy is Not Yet Available). August 2023, the (Battery Voltage Level Percentage Warning Light) displayed 2 separate times. Then unknown dates, the front left driver's and right passenger's window were only going down by about 10-25% and up by about 90%, without completely closing. on 10/26/2023, the (Coolant System Malfunction Reduced Drive Performance Serviced Required) displayed. It has been at the Henderson of Mercedes-Benz Dealership to this date because knowing and understanding of the issues and unable to repair the problem. Additionally, being told the fuel pump recall parts not available until May of 2024. Monthly payments are still made, but the vehicle is not or cannot be driven due to the C-Class Sedan Operator's Manual on Pages 26-27, noting this could cause Crash, Injury and/or Death. I (FEAR FOR MYSELF, FAMILY, PUBLIC'S SAFETY & LIFE). The vehicle was brand new build and only has about 2,300 actual miles total. Reasonable time, due process has been given or allowed and being told it is unknown when or how all repairs will be fixed and still owning and not being able to drive the vehicle. Conclusion, I have loss all faith, trust and confidence in vehicle and if all will ever be fixed and (I WANT A TOTAL & FULL REFUND NOW).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554932November 13, 2023
UNKNOWN OR OTHER
Ac/heater smells like mold/musty/mildew inside the cabin. Took for the extended warranty but will not honor unless you have proof of cabin filters purchased every year. This is their way of finding a loop of not fixing the issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554961November 13, 2023
VISIBILITY/WIPER
- windshield, and I had Satellite repair it through an insurance claim because it was urgent for my safety. - the windshield and its adhesive never bonded together making the windshield structurally unsafe and if I would have gotten into an accident then my vehicles airbags would have not deployed properly. - The issue was brought to my attention from a Satellite repair representative. - yes Safelite who contacted my insurance. - I went through a car wash and found water making its way into my car interior, which I then inspected and found that my windshield was floppy and not attached to my car and how it should.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554689November 11, 2023
SUSPENSION
a rusted rear subframe is more prone to crack when a driver hits a pothole or wants to brake quickly, which can lead to instability in the vehicle's rear suspension.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554281November 9, 2023
SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: DYNAMIC BRAKE SUPPORT/BRAKE ASSIST
The contact owns a 2022 Mercedes-Benz C300. The contact stated while driving at unknown speeds, the active brake assist was not functioning properly. The brakes were applied without an object around the vehicle. There were no warning lights illuminated. The local dealer was contacted and scheduled an appointment. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 20,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554301November 9, 2023
STEERING
The contact owns a 2015 Mercedes-Benz C300. The contact stated that after starting the vehicle, there was an abnormal grinding sound coming from the vehicle. The contact stated that the steering wheel had seized. The contact had the vehicle towed to a certified mechanic and was informed of NHTSA Campaign Number: 18V850000 (Steering) and the contact was referred to the dealer. The dealer was contacted and confirmed that the VIN was not included in the recall. The vehicle had not been diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 40,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11554128November 8, 2023
UNKNOWN OR OTHER
the rear subframe on my car rotted out. Before they called a recall/extended warranty,I paid to have it fixed. Since it is a 2011, I was not about to pay $7,000-$9,000 to get a new one. I made the best decision with the information I had at the time. It broke in June of 2022. I had the car fixed with a used subframe from Atlantic Auto. Once I realized there was FINALLY a recall/Extended warranty, I submitted All necessary paperwork and have been denied. I wrote to Mercedes Benz Corporate office. They contacted the Warwick store. Went back and forth All summer and they have refused to reimburse me the &2,299. that I spent to fix the car. It says the decision is made on a case by case review. They have denied my claim. I have all the correspondence between myself and Mercedes Benz.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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