Mercedes-Benz C-Class Complaints (2016)

323 consumer complaints on file.

#11524139May 27, 2023
UNKNOWN OR OTHER
I was driving on the local freeway and the strip of glass between the windshield and the sunroof flew off and landed on the pavement behind me. Thankfully the car behind me was far enough away that it didn't hit it--but it could have if it had been. If that had happened I shudder to think what the result would have been. The risk is to those behind me--not to me. The only indication that there was a problem before the event was only a few seconds before the piece flew off when it started to become unattached and the noise from the wind catching it raised my concern. I took the car to Mercedes and had to pay $2300 to have the piece replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11523852May 25, 2023
FUEL/PROPULSION SYSTEM
Fuel smell in cab of car. Strong smell. Took it to dealer and they said they were damp with fuel
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11522279May 16, 2023
UNKNOWN OR OTHER
I bought my 2016 merecedes Benz c 300 4 matic with an engine light on . I took it the dealership and is the positive crankshaft failed . The crankshaft could reduce power on car . At 73000 mile the crankshaft should have not failed .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11520723May 6, 2023
ENGINE
The PCV Valve/crankcase has broken 3 times on this car with different repairs and parts. This is happening very commonly to these cars and may cause significant safety issues. The code is P052E
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11520209May 3, 2023
ENGINE
my engine light came on. When I took the car to get diagnosticated message P052E showed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11520243May 3, 2023
FUEL/PROPULSION SYSTEM, ENGINE
My car failed smog test due to code P052e positive crankcase ventilation regularly valve. Upon some research, I found that this is very common issue with this car. The repair costs +$2000 before tax at the dealership. Please consider this complain as this issue is very common with this make model and unfortunately many drivers don’t realize that it’s due to faulty system.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514974April 1, 2023
ENGINE
PCV Valve causing contamination and shortening the life of the engine oil.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514709March 31, 2023
ENGINE
Check engine light keeps coming on and off.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11513743March 25, 2023
UNKNOWN OR OTHER, LANE DEPARTURE: BLIND SPOT DETECTION
This car is currently stolen out of bishopville south Carolina.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11509155February 26, 2023
FUEL/PROPULSION SYSTEM
When i would turn the car to warm up, it has a hefty gasoline smell. Ive seen a lot of people online talk about the same issue. It seems there is a leak somewhere and it is definitely not safe. Especially when i turn on the heat, it just blows the gasoline into my face. This cant be safe and should definitely be fixed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11508260February 21, 2023
ENGINE, POWER TRAIN
I bought the car with 51k miles . Engine failed at 71k miles , due to piston #1 cracking . Almost caused me to get rear ended on a busy street . I went to the dealership and they charged me $10250 to replace the engine with a remanned long block and they offered a 2 year warranty. 9 months, only 19k miles on “new motor” the “new” engine fails again … same reason piston # 1 cracked failed suddenly on the highway and I had to push the car to safety to the emergency lane while cars where coming.. I went back to dealer demanding a replacement and told them this is a common occurrence and they refused to help me . I called corporate. They refused to help me saying I would have to purchase an engine for the second time out of pocket when it only lasted 9 months. This is a big fault in the m274 engine … it’s also a safety hazard that can cause serious injury, fire , or even a deadly accident. I read that it’s a common issue with these engines.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11508425February 21, 2023
STRUCTURE:BODY
Panoramic sunroof pillars/rails detaching while operating vehicle. The front roof panel located between the windshield and the panoramic sunroof may not have been bonded correctly to the vehicle during a prior repair. When operating the vehicle at a moderate speed, the sunroof continued to adjust itself on its own. Belive that there is a risk of the sunroof detaching from the stock plastic rails and that it may not be properly bonded. I do not feel comfortable usuing the Panoramic sunroof for fear of it detaching during driving conditions, putting other motorist and myself in danger.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11507685February 16, 2023
ENGINE, FUEL/PROPULSION SYSTEM, ELECTRICAL SYSTEM
Check engine light appeared this morning, had the code scanned and found it to be P052E. This code is in reference to the Positive Crankcase Ventilation valve, which is responsible for routing excessive crankcase gases. After extensive research online, it would seem this is a known issue for Mercedes once they reach 50,000 miles, right outside of warranty. This is a very costly fix due to it being labor intensive. This should be a recall as it is a known mechanical issue, and even the dealers echo the same.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11507291February 14, 2023
ENGINE
I made 2 engine stalling complaints at the dealership in 2021/2022.. the dealership kept my vehicle for 2 days and said nothing was wrong. My vehicle recently in stalled in drive gear, I had to cut the car off & turn it back on
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11506885February 13, 2023
ENGINE
PO52E code showed was the code pulled on my 2016 Mercedes c 300 4 matic . My car had 73000 miles on when I bought it and that code was pulled when I bought it . At 73000 miles my car shouldn’t have this problem .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11506591February 10, 2023
ENGINE
Gas smell inside the cabin. Check engine light on . Took to dealer, stated P052e code came up. Positive crankcase ventilation valve went bad. The dealer says it is a pretty common problem for this vehicle and engine. Quote came back close to $2900 for parts and labor
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11506631February 10, 2023
FUEL/PROPULSION SYSTEM, ENGINE
A fuel smell can be detected at idle inside the vehicle and around the engine area. A recall for some VIN's of this model in this year was enacted but not this particular model. No visible fuel moisture can be detected. A repair facility stated it might be a faulty clamp on the return fuel line. The recall was for dirt on manufacturing between the fuel injectors/fuel rail. This is a safety / emissions problem that hopefully does not lead into a fire. No warning lights are present. This started about 2 months ago
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11505413February 3, 2023
ENGINE
My check engine light came on at about 68,800 miles. The OBD code shows that I need the Positive Crankcase Ventilation valve replaced. The repair for this is approximately $2,300 and requires about six hours of shop labor, and the part costing over $425. I’ve never known a PCV replacement on any vehicle to be more than $60, with the part itself being about $10-$20. Most times, the part can be simply cleaned and replaced. This is very disappointing. Especially given that the engine design, just two years prior, would have been less than $200 for the same repair, with part costing about $60. The vehicle does not show any symptoms of the part being blocked, as indicated in the code. There is no hesitation, loss a power or decline in fuel efficiency. However, the engine light cannot be turned off until the part is replaced. I think that $2300 to replace a part on seven year old car, well under 100,000 miles is indicative of either poor design or predatory. Hopefully, something can been done to address this. Thank you!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11505253February 2, 2023
VISIBILITY:SUN/MOON ROOF ASSEMBLY
The contact owns a 2016 Mercedes-Benz C300. The contact stated that the sunroof failed to open. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was approximately 65,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11504955February 1, 2023
FUEL/PROPULSION SYSTEM
Strong smell of gasoline on a daily basis for 3 months. Took vehicle to mechanic's and was informed that the fuel lines were leaking. Was shown the cracked lines.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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