Mercedes-Benz C-Class Complaints

3,817 consumer complaints on file.

#11534679July 26, 2023
ENGINE, FUEL/PROPULSION SYSTEM
Check engine light came on. Had a diagnostic check and was told that the crankcase ventilation sensor needs to be replaced which will cost $1200.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11534253July 25, 2023
UNKNOWN OR OTHER
Windshield seal failure, moisture in car
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11534259July 25, 2023
ENGINE
Engine crankcase vent valve failure. common issue with these vehicles. can cause fire
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11534364July 25, 2023
UNKNOWN OR OTHER
My sunroof shade is stuck open which makes my extremely hot . I’ve been burned twice by my seat . My car has 93,000 miles .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11534426July 25, 2023
FUEL/PROPULSION SYSTEM, ENGINE
Just got my car from the mechanic on 7/21/23 and it through an error code as I drove home. Towed back snd mechanic stated I need to replace the crank case vent valve assembly. Further stated that they keep in stock because it happens often. Error code P2188
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11534093July 24, 2023
STRUCTURE
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 that the vehicle had experienced the failure listed in NHTSA Campaign Number: 21V197000 (Structure) however, the VIN was not included in the recall. The vehicle was not repaired. The manufacturer was contacted, and a case was filed. The failure mileage was 41,700.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11533877July 23, 2023
FUEL/PROPULSION SYSTEM, ENGINE, UNKNOWN OR OTHER
My c300 2018 only has 50k and suddenly the engine light is on, when I check it shows that I need the Positive Crankcase ventilation valve replaced. it cost $2300. As I know a lot of people who own Mercedes have the same problem. Three mechanics claim it on almost all C, CLA, and GLA models. Please make Mercedes recall it finally.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11533886July 23, 2023
STRUCTURE:BODY
Basically, this is a common problem with the c300 coupes, I had an recall to replace front stationary sunroof panel. My sunroof panel started lift the last few months in 2022, therefore I took it to the dealership at the start of 2023 which they notified me this was a big problem and was unsafe on the road because it will eventually lift off while driving. Sense my engine lights were on and needed immediate attention, I had my car service which cost a lit of money. I had one problem about why would I be charged $400 for windshield seal which I assume was apart of the problem with sunroof panel seal. After car was in shop for quite some time, they fixed my sunroof panel that had an recall. About a month later, the sunroof panel was lifted and started to come off. I brought the car back into service which service advisor notified that he ordered about sunroof panel. I called the service advisor about once a week to check sunroof panel but I kept getting the run around for months. Finally, recently I went to another dealership and they told me that about 30 sunroof panel were in stock at near by warehouse which means the previous dealership was not trying to fix the problem but were happy to charge me 8k to fix my car. Please I need help with this situation and I will attach photo of invoice. Please I want to know of I can have another recall on the same particular problem. Thank you
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11533725July 21, 2023
FUEL/PROPULSION SYSTEM
Each time I filled my gas tank, there was an overpowering odor of gasoline inside the car and outside on the passenger side. Once the tank would get down below 3/4 of a tank, the odor would dissipate until down to a 1/4 of a tank it would go away completely.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11533736July 21, 2023
FUEL/PROPULSION SYSTEM
I suspect a failure in the fuel tank / system seal, which is allowing gas fumes into the cabin. There is a strong smell of gasoline inside the cabin especially after a full tank refill. This issue was also a problem for my 2008 Mercedes Benz E350. It has not been inspected but since my E350 had a similar extended warranty repair, I assume this would be similar. The strong fumes and odor in the cabin is a health risk of breathing the fumes or explosion. There are no warning lamp to indicate this failure. No recalls or extended warranty currently to fix this problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11533738July 21, 2023
FUEL/PROPULSION SYSTEM, UNKNOWN OR OTHER, ENGINE
There is a crack in the flange causing a fuel leak in my C300 2011 Mercedes-Benz built March 2011. A strong gas smell fills the car. This situation is extremely dangerous and should be included in the recall that was approved for vehicles C300 manufactured from April 2011-July 2011. Please include my vehicle in this recall. There is only a one month difference.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11533418July 20, 2023
POWER TRAIN
The car will randomly go into a neutral condition while driving the car. This occurs about once per month, sometimes more often. I will come to a stop for a light or stop sign, upon green light I release the brakes and then gas only to find the engine free revving and the car will not move. I must place the car in Park and then Drive again in order for it to move forward. I have brought this up with Mercedes multiple times and eventually had the transmission replaced. 2 days later, the same thing happened. They do not have a repair available and are dragging their feet to fix. There is a systemic defect in the 9G tiptronic transmission. There are other reports of this transmission going into a "neutral" condition. With the C43 being a relatively lower production class in the C class lineup, I suspect the issue has not made the attention that a higher production vehicle would. I have video with the car 'in gear' and not able to move. And video evidence of the of the transmission glitch.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11533167July 19, 2023
STRUCTURE:BODY, SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS
The contact owns a 2012 Mercedes-Benz C300. The contact stated that the vehicle was making a loud bang sound towards the rear of the vehicle while driving over bumps in the roadway. The contact took the vehicle to the dealer and was informed that the rear subframe and the rear brake line were severely rusted. The subframe was replaced under an extended warranty coverage; however, the brake line was not covered under the extended warranty. The brake line was not replaced. The manufacturer was made aware of the failure. The approximate failure mileage was 110,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11532889July 18, 2023
UNKNOWN OR OTHER
The code P052E reads at only 49.000 miles....Mercedes wants $3000.00 to repait ir (replace PCV valve ). Car runs and drives normally....its probably a faulty sensor. I have seen a lot of posts with owners havins same issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11532943July 18, 2023
ENGINE, FORWARD COLLISION AVOIDANCE: WARNINGS
Engine Crankcase (pcv) Problems on Mercedes Benz C300 and harness issue. I’ve noticed this is a very common issue many owners as myself have experienced and no action for a recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11533008July 18, 2023
STRUCTURE, EQUIPMENT
The contact owns a 2010 Mercedes-Benz C300. The contact stated while driving at an undisclosed speed and attempting to make a left turn, the brake pedal was depressed, and the vehicle drifted farther to the left than intended. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who observed abnormal deterioration of the sub frame. The vehicle was later taken to the dealer, but the vehicle was not yet diagnosed. The vehicle was not repaired. The contact investigated and related the failure to Manufacturer Communication NHTSA ID Number: 10233780 (Structure, Equipment). The manufacturer was not notified of the failure. The failure mileage was 75,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11533049July 18, 2023
ENGINE
PVC valve replacement Engine light off and on Started about 3 months ago
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11532719July 17, 2023
STRUCTURE:BODY
While driving on highway a load noise was heard pulled off the road to see what it was and the part of the sunroof that meets the windshield had raised up so we tried to push it down and continue towards home the car had to be driven at around 40 miles per hour to keep it from elevating and in fear that it might come off and hit someone's car or cause an accident
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11532743July 17, 2023
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL, FORWARD COLLISION AVOIDANCE: WARNINGS, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
Major safety issue - PHANTOM BRAKING. On 2 separate occasions the vehicle engaged emergency braking while there was no apparent hazard. This phantom braking was very dangerous. This car has adaptive cruise control. It occurred in the exact same spot on Interstate-84 and NE 21st Avenue in Portland, Oregon while traveling east bound. The cruise control was on and engaged in incident 1. Cruise control was on, but not set, in the second incident. First incident was approximately 6/1/23. Second incident was 7/16/23. I have reported to Mercedes Benz Customer service. Case opened #2-42097036640. I will contact the dealership to report as well.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11532607July 16, 2023
UNKNOWN OR OTHER
I was driving on the highway and came to a sudden stop and the car fishtailed putting our safety and the safety of others at risk. I brought my car to a mechanic and I changed my tires. When I went for a wheel alignment the mechanic found that the K bar subframe was corroded and cracked. There was no warning prior to the failure. I had no idea there was a problem because the K bar is behind the snow flap and was hidden.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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