2015 Mercedes-Benz C-Class
Problems, recalls and owner-reported issues
Engine is the leading concern among 449 owner complaints filed for this model year. This is the 7th highest complaint count among 23 C-Class model years with reports.
Of the 2015 reports, 11 involved a crash and 1 involved a fire. 10 people were injured.
What owners report most often
Recalls and investigations
No safety recalls on file.
Representative owner complaints
449 reports, newest first.
Other or unspecified, Visibility/wiper, Mar 11, 2025
Panoramic roof explode sound like a gunshot but the roof exploded
Structure, Visibility, Mar 5, 2025
I had the sunroof opened and it almost blew off, if I didn’t pull over it would have. I took it to the shop and was told it is a manufacturers issue.
Suspension, Engine, Mar 5, 2025
The contact owns a 2015 Mercedes-Benz C300. The contact stated that approximately every 6-8 months, the vehicle sputtered while driving at various speeds or while idling. The contact stated that a month after the first failure had occurred, the front end of the vehicle lowered as if the shocks or hydraulic system had failed. The failure had occurred 3 times within a year and a half. The contact stated that after the second failure, the entire vehicle lowered several inches, and at the third failure, only the front end of the vehicle was lowered. The dealer diagnosed the vehicle and determined that the hydraulic pump and the connections from the shocks to the hydraulic pump had failed. The failure reoccurred approximately 8 months later. The vehicle was returned to the dealer who diagnosed the same failure and completed the same repairs. The failure reoccurred approximately 8 months later, and the vehicle was returned to the dealer who was unable to determine the cause of the failure. The vehicle was not repaired. The dealer provided the contact with a loaner while attempting to have the contact trade the vehicle. The manufacturer was made aware of the failure. The failure mileage was approximately 110,000. The VIN was not available.
Engine, Feb 11, 2025
The engine lamp turned yellow. The car got inspected by a mechanic and showed code. P052E, which indicates the defect in the crankcase ventilation valve. I see that many cars of the same model in which were produced about the same year had the same defect. I called the manufacture customer service and they claim that my van was not included in the recall. My vehicle likely had the same problem as other people did in the past, but for some reason my vin was not included.
Suspension, Feb 10, 2025
Rear subframe cracked while driving and rear of car sways from one lane to the next when brakes are applied. Car is not safe
Other or unspecified, Lane departure, Feb 7, 2025
Check engine light came on, it has to be with the Positive Crankcase Ventilation Valve. So I found out that other people are experiencing the same thing. So I know that there is a recall by the manufacturer. And I want to do the same for me.
Other or unspecified, Feb 4, 2025
Crank case ventilation Valve needs replaced. This is a hazard and multiple Mercedes owners have reported the same issues.
Power train, Engine, Jan 30, 2025
failed piston wrist pins from early production of mercedes w205 c300. The issue was diagnosed by mercedes of manhattan and could not provide me a fix. Stated that the issue is common with the vehicle and it does not warrant a recall for this issue. i believe its a safety issue and my vehicle only has 60K miles
Fuel/propulsion system, Jan 24, 2025
There seems to be a continuous gas smell in my car and I see some class action law suits for the same problem but dealership says there is no recall- synopsis of class action below February 26, 2021 — A Mercedes C300 fuel smell has led to a class action lawsuit that alleges 2015-2019 (W205) C-Class vehicles have defects that cause fuel leaks and odors. According to the Mercedes-Benz class action lawsuit, fuel can leak into the engine compartment from fuel line connections to the fuel pump at the rear of the engine compartment. Mercedes C300 and other C-Class vehicle occupants complain of strong fuel smells caused by the fuel leaks. Please assist
Fuel/propulsion system, Jan 24, 2025
Due to the type of fuel line and clamps used to fasten them, cold weather has caused them to shrink such that gas leaks, which comes through the car vents into the car cab and now into my [XXX] and [XXX] kids's lungs. Mercedes has issued a 10 year warranty on this specific feature, but it should be a safety recall unless we agree that inhaling gas vapors is okay for your health. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Structure, Visibility, Jan 16, 2025
The contact owns a 2015 Mercedes-Benz C63S AMG. The contact stated while driving at 30MPH in a School Zone, pieces of the panoramic sunroof detached. No warning light was illuminated. The vehicle was driven to the local dealer to be diagnosed. The contact was informed that the panoramic rails of the sunroof needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 42,500.
Structure, Dec 9, 2024
The contact owns a 2015 Mercedes-Benz C300. The contact stated that while driving at various speeds, there was a sound of air entering the vehicle from the sunroof. No warning lights were illuminated. The vehicle was taken to a local dealer to be diagnosed. The contact was informed that the entire roof lining needed to be replaced. The vehicle was not repaired. The contact linked the failure to NHTSA Campaign Numbers: 23V854000 (STUCTURE), and 21V197000 (STRUCTURE); however, the VIN was not included. The manufacturer was notified of the failure. The approximate failure mileage was 50,000.
Structure, Nov 1, 2024
The contact owns a 2015 Mercedes-Benz C400. The contact stated that while the vehicle was being serviced, the contact was informed by the dealer that the rear subframe needed to be replaced. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 112,000.
Engine, Oct 7, 2024
P052e positive crankcase ventilation regularly valve. 2015 Mercedes Benz c300 turbo 4matic
Structure, Oct 2, 2024
I believe my car was missed on the panoramic roof issue. I have been hearing a lot of wind and road noise coming into my car from the roof and now my roof is having issues completely closing. A few guys with c300 I know were recalled for the same issue and they had theirs repaired from the dealer under recall and after a few trips to different dealers they told me to try and add it here through the website.
Power train, Sep 24, 2024
Known/ common issue with the positive crankcase ventilation regularly valve on my 2015 c300.
Other or unspecified, Sep 3, 2024
The rear subframe rusted and needed complete replacement. The service department would not pass the car for inspection without replacement. My brother, who also has a Mercedes C300 model but from the prior year, reported that he had the exact same issue. However, Mercedes issued an extended warranty on his model. In researching this issue, I have discovered that this rusted subframe issue is prevalent in C300 models in all years, not just the model years before mine. I compared the service notes from my invoice with my brother's invoice. It is the exact same issue. I contacted both the Mercedes dealership and Mercedes corporate about this issue, seeking resolution. I provided them with all the documentation. Their answer is simply that my VIN does not qualify under their extended warranty and refused to look into it further, despite my pointing out that it is the exact same problem.
Suspension, Aug 31, 2024
The defect is a rusted rear subframe with large holes that will break and cause wheels to become detached and lost control of the vehicle. The issue was identified and repaired by an authorized Mercedes dealership. Additionally, an authorized Mercedes mechanic provided video of my vehicle showing a rusted rear subframe with huge holes on both sides of the vehicle. He also stated the vehicle is unsafe to drive. Mercedes has issued an extended warranty on this same exact issue but only to certain VINs.
Engine, Aug 27, 2024
Crankcase Ventilation Valve Problem code P052E71
Structure, Suspension, Aug 26, 2024
My car (vin [XXX] ) a 2015 Mercedes C300 is experiencing the same premature rusting on the subframe. I was told that while a lot of Mercedes are covered, mine is not for some reason but I'm at the same risk for the subframe getting holes in it and wheels breaking off. I only have 78,000 miles on my car, only have it serviced at the dealer and it has been garaged parked. This type of damage is not typical for a car that has been this well cared for and for the amount it has been driven. I called Mercedes to honor the $5600 or to extend the warranty should it have to be replaced and they said to file a claim here. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Structure, Aug 16, 2024
The rear subframe is rusted through. It is a known manufacturing defect where water sits and rusts through the subframe. This was a recall on various Mercedes up through 2014. Multiple 2015 models have the same issue, including my Mercedes 2015 C300 4MATIC. I have a 2009 SLK with the same issue, which Mercedes previously fixed and acknowledged the manufacturing defect. The part number under the recall through 2014 is "212 250 3805" My 2015 car has part number "212 350 3605" that is not covered but still has rust issues. See attached picture The subframe can result in the back wheels falling off. My subframe is severely rusted through and a risk as a driver. A certified Mercedes dealer has inspected this issue and confirmed the safety but Mercedes will not cover the repairs for the known defect. There are no warning lights or indicators to this issue.
Structure, Aug 9, 2024
The contact owns a 2015 Mercedes-Benz C400. The contact stated while driving 55-60 MPH, the front roof panel separated and flew off. The contact drove back and was able to pick the front roof panel off the road. The vehicle was taken to the dealer, where it was determined that the front roof panel needed to be replaced. Additionally, the dealer informed the contact that the recall repair of NHTSA Campaign Number: 21V197000(Structure) was previously performed on the vehicle, and the additional related repair would be at the contact's expense. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 23V854000(Structure). The manufacturer was not notified of the failure. The failure mileage was approximately 74,000.
Power train, Engine, Fuel/propulsion system, Aug 8, 2024
Purchased vehicle in march 2024 it went thru emission inspection in 2022 after failing it passed second time . I go for inspection and it fails emission test again just passed two years later. After doing my research Positive Crankcase Ventilation System seems to be a very common problem. It also cost 2000 to fix. Appreciate you time thank you
Electrical system, Jul 22, 2024
The contact owns a 2015 Mercedes-Benz C300. The contact stated that while idling at a stop light, the STOP/START system activated; however, after releasing the brake pedal and attempting to accelerate, the instrument panel illuminated simultaneously with several unknown warning lights. The vehicle then powered off completely. The contact manually restarted the vehicle and the vehicle responded as needed. The contact turned off the Automatic STOP/START system. The failure occurred two additional times. The failure had not recurred with the Automatic STOP/START system deactivated. The vehicle was taken to the dealer but had not been diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was 158,000.
Visibility, Jul 2, 2024
Known issue with panoramic sunroof on 2015 Mercedes C300 sunroof. Having to be replaced on “many” vehicles costing over $2500.00 for repair. Sunroof gets stuck and will not close.