Mercedes-Benz C-Class Complaints

3,817 consumer complaints on file.

#11549007October 9, 2023
UNKNOWN OR OTHER
In the past few months while driving this car in the Washington DC metro area at normal road speed, the car has suddenly and unexpectedly lost driver power. Each time, I have pushed down on the gas pedal, and after some hesitation the car has moved forward, and then continued to operate normally. This has happened three times in the past 3-4 months.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11548843October 7, 2023
ENGINE
check engine light
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11548575October 6, 2023
UNKNOWN OR OTHER
I started hearing noises about a week ago while driving. Last night while driving home in the evening traffic, I braked and car violently jerked and veered to the right almost hitting the car in the front. I took the car to a shop this morning and they found that the rear subframe had collapsed due to rust and advised the car was extremely dangerous to drive.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11548470October 5, 2023
ENGINE
Engine code P052E has come on at 60k miles. After researching the problems this is a very common problem with the 2016 c300 that mercedes refuses to address. To add insult to injury the part needed to be replaced is a sensor worth 100 dollars but mercedes charges over $2500 because you need specialty tools to get to it. This is a very common problem with owners around 40-80k miles and has no cause other than faulty parts on Mercedes end.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11548498October 5, 2023
ENGINE
Engine code: P052e - the widest spread engine issue on Mercedes which fails emissions testing. Crankcase ventilator issue which leads to stalling.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11548516October 5, 2023
ENGINE
My check engine light came on recently on my 2015 C300 4matic. Car has 66500 miles on it. The code P052E71 was diagnosed - The valve for the crankcase ventilation has a malfunction. The actuator was blocked. This problems seems to be occurring to a lot of similar cars from Mercedes and some of them have reported that this issue keeps coming back. The dealership and other auto body shops say it's going to cost around $1500-$2000, considering how it's a tedious job to do and involves multiple hours of labor. The dealer won't repair it as part of warranty. This definitely seems to be an engine issue with the car and has nothing to do with how we drive. Cars not older than a couple years are starting to see this issue. There needs to be a recall for this and have Mercedes does something about it. Why are the consumers having to spend money to have the same repairs done for a bad design, parts and engine being provided by Mercedes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11548209October 4, 2023
FUEL SYSTEM, GASOLINE
The contact owns a 2015 Mercedes-Benz C300. The contact stated that after refueling, the contact smelled a gasoline odor throughout the interior of the vehicle. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the canister purge valve. The vehicle was not repaired. After investigating the failure, the contact related it to NHTSA Campaign Number: 15V138000 (Fuel System, Gasoline), but the VIN was not included. The manufacturer was not notified of the failure. The failure mileage was 10,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11547899October 3, 2023
ENGINE
The valve for crankcase ventilation has a malfunction. The actuator is blocked. Seems like its a common problem for all mercedes C300 ~2015 models. The part should be recalled.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11547621October 1, 2023
ENGINE
My mercedes c300 Check engine light came on for P052e positive crankcase ventilation and after doing research, this sounds like a common problem for this car / model
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11547526September 30, 2023
ELECTRICAL SYSTEM
Check engine light came up for a PCV valve error. Car was driving fine with no recent changes and the repair is going to cost over 2000$.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11547209September 28, 2023
UNKNOWN OR OTHER
P052E. Positive crankcase ventilator valve replacement.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11546837September 27, 2023
POWER TRAIN
I was driving my vehicle when the transmission started shifting erratically. The shifts were not smooth but hard and the car was shuddering. Yes the vehicle is available for inspection. My safety and the safety of others were at risk due to the erratic behavior of the vehicle and how it affected my ability to focus on driving safely. Yes my vehicle has been inspected by the manufacturer and the problem has been reproduced by my local Mercedes Benz dealer. There were no warning lamps or messages prior to the failure. After a few weeks of driving I saw a “low coolant” warning appear, this turned out to indicate that the radiator had leaked coolant into the transmission which damaged the internal transmission components and torque converter.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11546944September 27, 2023
AIR BAGS
The contact owns a 2013 Mercedes-Benz C300. The contact stated that while his daughter was driving at an undisclosed speed, the air bag warning light and the check engine warning light intermittently illuminated and then turned off independently. Additionally, the “Service Air Bags” message was displayed. The dealer was not notified of the failure. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and the contact was informed that the VIN was not included in the recall and that the front passenger’s side air bag was previously replaced. The failure mileage was 127,328.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11546988September 27, 2023
UNKNOWN OR OTHER
Had to have crankcase ventilation system replacement at 74k miles. $2,032.98 to replace. Did get a check engine light.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11546602September 26, 2023
STEERING, ELECTRICAL SYSTEM
Mercedes has had an issue with the steering lock for years and continue to not fix the issue. My vehicle would not turn on at random times, and this is due to a fault with the steering lock and key. The worst part of the issue, it’s only solved by Mercedes due to security issues and costs $2000. I was locked out of my car for hours, missing a doctors appointment, and if this was during a snow storm or heavy freeze (I live in CO), this is a potential fatal flaw. I also learned they cannot fix my vehicle for months due to high demand and coming from Germany. Looking online this is a continued problem for over a decade of vehicles and this needs to be resolved either by recall, a price adjustment due to this being a Mercedes flaw, or give the capability to certified maintenance locations to do the job for a fraction of the price (I see the price of the part is marginal compared to the upcharge by the dealer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11546674September 26, 2023
FUEL/PROPULSION SYSTEM
Dealer notes, fuel tank, and hold down straps are rusted and rotted
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11546676September 26, 2023
ENGINE
Positive crank case valve failure. Check engine light on. Mechanic started this was extremely common and a costly repair on lower mileage Mercedes Benz vehicles. Mercedes Benz forums also mention this is extremely common and frustrating. This happened at slightly over 50k miles on my vehicle. Error code P052e
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11546465September 25, 2023
FUEL/PROPULSION SYSTEM
My engine light comes on intermittently for days or weeks at a time. Code is P052E indicating an issue with the PCV valve. I'm waiting to replace the part.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11546254September 24, 2023
ENGINE
P520E code which is caused by a crankcase ventilation issue. The fix costs upwards of $2000. It seems to be a common issue with Mercedes vehicles with 4 cylinder turbos and should be a recall on this system.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11546160September 23, 2023
WHEELS, SUSPENSION, UNKNOWN OR OTHER
Rear driver side wheel was making a clicking noise leading us to believe there was an issue with the strut and/or shock. Due to the nature and severity of the noise, we took the vehicle to our mechanic ASAP. Upon inspection, mechanic identified that the sub-frame had completely rusted through which could lead to other catastrophic issues making vehicle no longer safe to drive unless repaired. Due to the age of the vehicle being 11 years old, the cost to repair was almost the value of the vehicle basically making this a complete loss. I understand that Mercedes Benz has extended the warranty to 20 years for this issue for other models identifying that it is a design/parts defect but not the C300 although I have found that this is also an issue for this model.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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