2014 Mercedes-Benz CLA250: check engine light

Filed Nov 17, 2025 · Engine · PA

I own a 2014 Mercedes-Benz CLA 250 with the 2.0L turbocharged 4-cylinder M270 engine. The check-engine light came on and an OBD-II scan showed fault code P052E / P052E71, which indicates that the valve for crankcase ventilation (PCV / crankcase ventilation valve integrated into the valve cover) has a malfunction and the actuator is blocked. The vehicle is available for inspection and, if the repair is performed, the failed part can be retained. This appears to be the same failure that has been documented by other owners and by Mercedes-Benz on the related M274 engine used in other models (same 2.0L turbo engine family and PCV / crankcase ventilation design, but in a longitudinal layout). For those vehicles, Mercedes has issued technical service bulletins and extended emissions-related warranty coverage for the crankcase ventilation / PCV system, but vehicles like my CLA with the M270 engine are excluded even though they show the same DTCs and failure. In my case, the problem has so far shown up as a check-engine light and stored fault codes, without obvious drivability symptoms yet. However, a blocked or failed crankcase ventilation valve can increase crankcase pressure, cause oil leaks, fuel vapor or oil smells, and potential turbocharger or drivability issues, which may create a safety risk if the problem worsens (loss of power or stalling). The problem has been reproduced multiple times with different OBD-II scan tools. I contacted Mercedes-Benz and was told there are no recalls or warranty coverage for this issue on my vehicle.

Filed Jan 28, 2025 · Engine, Fuel system · MN

Check engine code p052e - PCV valve replacement (Crankcase Ventilation valve) - common issue on car and known recall for other models

Filed Dec 19, 2023 · Engine · MN

Common issue with this make and model and many others Check engine code P052E

Filed Oct 26, 2023 · Engine · CA

My engine light is and as per mechanics I have seen it is a very common problem with mercedes benz around crankcase ventilation actuator. As per mechanics its faulty part and mercedes have changed it for new models but there is no recall on the older models. Cost to repair the part is around $3500. Issue with the part if causing environment problem as mileages is reduced and more fuel burning. This eventually impacts the engine and car.

Filed Dec 25, 2020 · Airbags, Electrical · 65,000 miles · CT

Right air bag malfunction error and check engine light for crank case. This is a very common problem that mercedes explained to me and also told me to check back for recalls because their vni system will probably show one

Filed Nov 9, 2020 · Engine · 40,000 miles · PA

I had a check engine light come on for a crankcase vent valve defect issue, the part is $750 and costs $1,950 with install. Upon identifying the issue, I spoke to the parts department at mercedes and they said that they have been replacing so many of these parts that it should be a recall on the c class and cla class. Most are repaired under warranty so it has not received a lot of focus. Mercedes is charging exorbitant rates to fix an error that they knowingly ignore to be a significant issue.

Filed Apr 27, 2020 · Electrical, Steering · 51,000 miles · FL

While driving 30 MPH I received a red parking brake error and my car began to be very difficult to steer. I then pulled over and received a yellow pre-safe mode error which illuminated the check engine light, ABS light, parking light. I took it took the dealer and was told it was a right tire sensor. This appears to be an ongoing problem with these cars and it's definitely not safe. This definitely needs to be recalled.

Filed Mar 12, 2017 · 24,000 miles · FL

On several occasions,in the rain under acceleration;the car goes into limp mode-check engine light comes on and you have no power to get out of traffics way. All but one case,the car returned to normal after a shut down and restart. In one instance,the check engine stayed on. When a dealer inspected the car they found no cause -(code said engine misfire )-the light was reset-since that dec.2016 dealer visit the problem has happened twice leaving the car to lose power while in highway traffic. A recent dealer visit (no engine light on ) resulted in their finding no issue. This is very dangerous,and not without many other similar complaint. Lives are in the balance here-we need government oversite-please!

Filed Feb 9, 2017 · Electrical, Engine · 1 miles · AL

I was getting off work and I was about to get out of the garage and I drove for about 100 yards and I get the check engine light on, power terain light on saying disabled and on the dashboard it said inoperative see operators manual and also pre_safe functions limited. It was going back and forth between these two. When I was driving going about 5mph, the car would speed up by itself without me touching the gas pedal, then it would slow down and speed up again. It was like I was learning to driving stick shift, stop and go, except the car was doing it by itself. Then I parked the car, and the arrow in tachometer was going up and down. It would go to 1.5 and then drop to .5 every second or so. Then I stepped on the gas and floored it while I had it on park and it did nothing. I shut it off and started it again to see maybe it would get fixed but it didn't. I left the car there overnight and the next morning when the tow truck came I started it, and only the check engine light remained on, everything else was gone. I drove it for about 500 yard to get it out of the garage to make it easier to tow. I have heard many other people had some issues with 2014 cla 250

Filed Feb 2, 2017 · Acceleration, Driver assistance · 20,000 miles · CA · crash · 1 injury

Purchased a mercedes cla 250c, and have had it became inoperative while driving on the beltway in washington d.c. Traffic, and more recently on the I-5 in san diego on 1/21/2017 during rain at speeds of 60+ MPH in heavy traffic. The vehicle decelerated quickly and lost speed. The console popped up flashing message 'pre-safe functions limited' on the console. The vehicle did not respond to accelerator. After coasting to the right shoulder I was hit, by a passing car, and the motorist kept on going.this had happened about 10 time, and I bought the vehicle new. Mercedes aware, yet they would not do anything because they said if the engine light is not on we cant diagnose it.

Filed Jun 2, 2016 · Engine · 1,000 miles · NC

Tl* the contact owns a 2014 mercedes-benz cla250. While driving 50 MPH, the check engine and RPM warning lights illuminated. In addition, the engine made a loud unknown noise and the vehicle began to lose speed. The failure recurred three times. The vehicle was taken to the dealer where the fuel pedal was replaced; however, the failure recurred. The manufacturer was notified of the failure. The approximate failure mileage was 1,000.

Filed Oct 14, 2015 · Electrical · MD

Brought cla250 6/2015 after three months loss power, engine light came on car decelerated. Took vehicle to the dealership after 3 different incidents, to be told there was a service bulletin on my car. Will keep you posted after pick up. Car was at the stop light and the vehicle deceleration went down.