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: engine
136 reports, newest first. Show all
Engine, Apr 8, 2026
Exhaust camshaft pulse wheel shifted on camshaft. Replacement of camshaft, positioner, oil control valve, timing chain and chain tension was recommended.
Engine, Fuel/propulsion system, Feb 23, 2026
After strong fuel odor in interior of car, inspected the engine and discovered fuel in the top of the engine this is a serious safety concern due possible car fire. The leak appear to be due failure of a top engine gasoline hose due low quality. The car barely has 30k miles .
Electrical system, Other or unspecified, Engine, Dec 2, 2025
The car suddenly glitched and locked itself—with my dog, my purse, my phone, everything—inside on an extremely hot day. There was no one around, and it was terrifying. I had opened the passenger door for my dog to climb in, and as I walked around to the driver’s side, the doors somehow locked on their own. Panic set in immediately. My dog, my phone, and my purse were all inside, and I had no way to call for help. We had just finished a walk, and then this happened out of nowhere. I had to run around searching for someone who could help. Eventually, I found a stranger who called the police, and they had to break the door open because it was over 100 degrees outside. I was terrified my dog would pass out from the heat. There were no warnings, no alerts, no messages. If it weren’t for that random stranger who happened to be there and willing to help, I don’t know how I would have gotten my dog out. It’s a reminder of the kindness of strangers, but the glitching car was truly terrifying and not ok.
Steering, Engine, Aug 6, 2025
The contact owns a 2015 Mercedes-Benz C300. The contact stated while driving 40 MPH, the vehicle unexpectedly veered to the left. There was no warning light illuminated. The contact stated that the steering wheel became inoperable, and the contact was unable to straighten the steering wheel. The brake pedal was also depressed. The contact attempted to depress the accelerator pedal however, the vehicle started to stall. The contact pulled over into a parking lot and was able to restart the vehicle. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 82,000.
Engine, Jun 26, 2025
Check Engine light came on recently, fault code P052E is identified by scanner. Car has 60,000 miles on original it. MB dealer wants to charge $300 for diagnostics, repair job (parts and labor) may cost over $2,000. Since this is critical emission compliance part/system, why is it not recalling?
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.
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
Engine, Oct 7, 2024
P052e positive crankcase ventilation regularly valve. 2015 Mercedes Benz c300 turbo 4matic
Engine, Aug 27, 2024
Crankcase Ventilation Valve Problem code P052E71
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
Engine, Fuel/propulsion system, May 21, 2024
Unknown
Engine, Apr 26, 2024
PCV VALVE FAILURE PO52E ERROR
Engine, Apr 5, 2024
Code P052E
Engine, Apr 3, 2024
Pcv valve malfunction causing the 0sensor to short. It’s also spitting oil into my CAT.. Mercedes has the part on back order and no one can seem to get it but everyone is having the same issue.
Engine, Apr 2, 2024
Check engine light on with PO52E error
Engine, Mar 19, 2024
Crank case vent valve assembly
Engine, Fuel/propulsion system, Jan 29, 2024
My 2015 Mercedes Benz vehicle is rarely driven as I took public transportation to work and has ~55000 miles. However, the engine has started throwing error code P052E verified by an independent dealer - crankcase ventilation valve failure. It means the engine could shut off amid driving and I did research and it seems like a very common issue that Mercedes Benz car owner encounter and feels like a severe car defect.
Electrical system, Engine, Jan 25, 2024
I keep getting the P052E PCV replacement valve issue. I see online that this has impacted multiple Mercedes C class but no recalls have been issued for this.
Engine, Jan 6, 2024
Was driving on the highway , car was running for about 7-10 min from the start , and when took off from exit , car started to shake and when pulled off to the side of the road , the car won’t start anymore , dealership said that engine failed ,
Engine, Dec 9, 2023
My car is registering code P052E71. The diagnosis says the valve for crankcase ventilation has a malfunction. The actuator is blocked. This is a common problem for this car with research. Some people have had to replace this part multiple times for their Mercedes which is a part that shouldn't fail. Nothing has been done such as a recall on this vehicle. The part and labor to repair this issue costs $1000+ dollars. Something should be done to help consumers. I'm doing my part to report this hoping something will be done.
Engine, Fuel/propulsion system, Dec 5, 2023
Emissions Failure P052E - Positive Crankcase Ventilation Regulator Valve Performance. Vehicle has been inspected. Warning lamp appeared for my engine recently. Cause by faulty plastic valves that requires a significant costly repair - around $3,000 USD
Engine, Nov 2, 2023
Check engine light- code read Valve For Crankcase Ventilation Has A Malfunction. After googling this, it appears that many Mercedes owners are having this issue and comes back again after repair. This should be recalled by Mercedes.
Engine, Oct 7, 2023
check engine light
Engine, Oct 5, 2023
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.