2015 Mercedes-Benz C300: check engine light

Filed Jun 26, 2025 · Engine · IL

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?

Filed Apr 9, 2025 · MD

Engine Light- Crankcase Ventilation Valve Replacement P052E71. Vehicle will jolt aggressively at the time of acceleration.

Filed Feb 7, 2025 · Driver assistance · CA

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.

Filed Jun 19, 2024 · CA

Crankcase ventilation valve. PCV valve has failed causing check engine light. Very common issue on this model according to my research. The dealer does not have this product in stock to facilitate a repair and no support to find the part. Very difficult when trying to pass an emissions test and this is the last thing holding that back.

Filed Apr 10, 2024 · Fuel system · MO

I got my oil changed last week and not my car has the check engine light on and is throwing the code p025e. From what I’ve read this is common problem in these cars. It’s an environmental hazard, because when this happens the car is not dispelling the fumes as it should and cannot be ventilated correctly.

Filed Apr 2, 2024 · Engine · MA

Check engine light on with PO52E error

Filed Nov 2, 2023 · Engine · NC

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.

Filed Oct 7, 2023 · Engine · NJ

check engine light

Filed Oct 5, 2023 · Engine · VA

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.

Filed Oct 4, 2023 · Fuel system · 10,000 miles · MD

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 the federal safety agency 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.

Filed Sep 21, 2023 · Engine · PA

After getting gas my check engine came on steady. Stayed on until cleared. After getting gas a 2nd time check engine light came on again, stayed on, but went out. Then after getting gas a 3rd time, check engine light came on again. Checked by a local Mercedes shop, code showed intake line oil separator bad. Owned this car for 7 years, never had an issue like this. 50,516 miles currently. Quote for repair is high, over $1000 dollars. All episodes of check engine light have occurred in a 4 week time frame.

Filed Sep 11, 2023 · Engine · TX

2015 MB C300 Check engine light came on, appointment scheduled to check issue before it went to the mechanic had a safety issue when accelerating to turn in a seven lane busy intersection the car lost acceleration and missed, running rough for a few seconds then recovered in time for me to get out of the way of the 45-50 mph oncoming traffic. Issue is P052E positive crank case ventilation valve which is going to cost $2200 to fix. Car has just over 60k miles on it and this is a known issue for YEARS on multiple MB turbocharged 4cl. I could have been t-boned if the acceleration hadn’t recovered. Does someone have to get killed before MB recalls the vehicles? 60k miles is not a lot of mileage for a car 8 years old that has had all its scheduled maintenance.