Mercedes-Benz C-Class Complaints

3,817 consumer complaints on file.

#11503957January 27, 2023
UNKNOWN OR OTHER, SUSPENSION, SERVICE BRAKES
Completely rotted & rusted sub-frame. Caused braking/stability/steering issues and was completely undriveable. Cost $2300 to fix, another $1000 for car rental as well as lost time at work. There have also been many reports of this problem with other drivers of the same model of vehicle. NO warning lamps or messages whatsoever, only knew the level of damage once I brought it into auto shop.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11504073January 27, 2023
AIR BAGS
unknown
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11503802January 26, 2023
SUSPENSION
Issue with my rear sub frame rotting out due to rust almost causing a very bad accident in a hard braking situation
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11503537January 25, 2023
STRUCTURE:BODY, SUSPENSION
My 2011 c300 has a rotted rear subframe making the car not able to be driven. It has major ,life threatening, costly damage and this issue already has a recall all over the world but not in the United States.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11503405January 24, 2023
POWER TRAIN
Error Code P052E Positive Crankcase Ventilation Regulation Valve Performance
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11503441January 24, 2023
EXTERIOR LIGHTING:TAIL LIGHTS
The contact owns a 2011 Mercedes-Benz C300. The contact stated when he started the vehicle, the driver side taillights were inoperable, and the taillight warning light was illuminated. The contact examined the taillights and noticed that the wires were melted, and the taillight assembly had melted as well. The dealer was contacted and stated that the vehicle was serviced under NHTSA Campaign Number: 14V177000 (Exterior Lighting). The contact received no additional assistance. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was 90,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11503518January 24, 2023
SUSPENSION, STEERING
Bought a 2013 Mercedes-Benz C300 4matic on 1/16/23 with only 80k miles. Alignment was off so took it to local Mercedes dealer today on 1/24/23. They advice that the subframe was rusted and not safe to drive, they are keeping it overnight to take a closer look and evaluate. Looked into it and found this is a common issue, experienced by many all over the world. UK has rust protection so they can get it replaced for no extra cost. Why do we have to pay out of pocket? Also did buy the Carfax and showed clean with no issue found before purchasing the vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11503241January 23, 2023
ENGINE
code P052E on 71000 miles. The crankcase vent valve replacement.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11503021January 22, 2023
FUEL/PROPULSION SYSTEM
Strong Gas Smell when heater comes on. Could be hazardous due to breathing in Fuel Fumes
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11502765January 20, 2023
FUEL SYSTEM, DIESEL, FUEL SYSTEM, GASOLINE
The contact owns a 2012 Mercedes-Benz C300. The contact stated that while parked, the vehicle failed to start. The vehicle was towed to the dealer where it was diagnosed as having water intrusion. The vehicle was not repaired. The contact referenced the failure to NHTSA Campaign Number: 22V955000 (Fuel System, Gasoline, Fuel System, Diesel). The manufacturer was made aware of the failure. The failure mileage was approximately 109,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11502792January 20, 2023
SUSPENSION
I was driving on the highway and had to hard brake when traffic slowed down quickly. My car was all over the road swerving and I am very lucky I wasn't killed. Come to find out the rear subframe had completely rusted out. I have since found out that this is a very well known issue with Mercedes that they have refused to do anything about. I am sure there have been people killed because of this. This vehicle had been at the dealer the week prior and had the rear brakes replaced. They said they did not notice that the subframe was rusting through at that time because it rusted from the inside out so it's not something that would be noticed until it completely rusted out, which in my case was on the highway. This is outrageous that Mercedes is getting away with ignoring this very well known safety issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11502894January 20, 2023
STRUCTURE:BODY, STEERING, SUSPENSION
Rear sub frame and suspension welds have cracks and are broken a loose which when having to put on brakes suddenly cause car to servely pull and twist which can cause a bad accident or worse.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11502562January 19, 2023
STRUCTURE:BODY, SUSPENSION
There is a defect in the subframe of the vehicle which causes it to corrode and rust out. Apparently, this is a known issue with certain years and models, and has already been recalled in Europe, but not the US.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11502630January 19, 2023
STRUCTURE:BODY
This 2013 Mercedes C300 with 88,xxx miles has significant subframe rust. This is unacceptable and is a safety hazard because the rust and corrosion will continue to spread and cause additional safety issues. This will cost over $4,000 to repair, but it is a manufacturer defect. There are a ton of similar complaints online, so this is clearly a systemic issue with this model that needs to be investigated.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11502701January 19, 2023
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
Hi i have seen lot of customers have filed this cause happening in all 2015 to.2018 c300 its crank case vent valve needs to be changed every 30 to 60k miles lt of posts i have seen i just want mercedes to recall this problem.as its $2400 to fix this because something they didnt did right and part goes bad . Pls help.us reach this so they can do recalls why we have to pay 2400
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11502437January 18, 2023
ENGINE
Oil separator failure. This a common design fault as documented by multiple complaints on the internet. This is another Mercedes Benz emission design flaw causing emission failures. This is very cheap part but extremely expensive to replace. Mercedes collects over $1200 per labor repair for each. THIS IS AN EMISSIONS POLLUTION AND SAFETY ISSUE THAT CAN BE SOLVED. PLEASE FORCE A RECALL. Engine severely smokes/stalls leaving people stranded on highways. When stuck, coolant is sucked into the engine mixing with the oil. No warning. The car
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11502449January 18, 2023
STRUCTURE:BODY
Subframe rots prematurely. Known issue to Mercedes Benz and has been recalled and covered in both Germany and Canada.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11501944January 16, 2023
ENGINE
I have 2015 C300 Model, total milage on the car is 30K. Dashboard is showing the check engine light and when I take to Dealership for diagnostic, the code is P052E which is a problem with Crankcase vent. Dealership tech had mentioned that this seems to be known issue effecting years 2015-2018. When I did search, he is right; many MB owners are facing same issue which is a malfunction during assembly/manufacturing. MB should be responsible for part replacement and labor. Please investigate and ask MB to run recall campaign. Thank You.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11502013January 16, 2023
STRUCTURE:BODY, SUSPENSION, UNKNOWN OR OTHER
Cradle and subframe are completely rusted out. This a widely common issue with these cars and am reading it across several forums. Other c300 owners say they have had the exact same issue and request for the MB dealership to fix it. Instead they are given a quote of nearly $10,000 to fix it. MB is responsible for this.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11501868January 15, 2023
STRUCTURE:BODY
Front Roof Panel Discoloring and Detachement
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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