What 251 owners told NHTSA about the 2017 Mercedes-benz C-class Hybrid

My car suddenly turned off at a stop sign. After I restarted it, it turned back on and my engine light turned on. I called the dealership and after inspection I was told that the valve for my crankcase was malfunctioning. The total cost, including both parts and labor are $1775. I have seen many complaints regarding this issue with the same vehicle. It is apparent that a recall should’ve been issued for this months ago. It is truly a safety issue when the car turns off at a stop sign or a ramp. I could’ve been hit while my car was stalling on a ramp exiting major highway. I implore you to rectify this issue immediately before someone gets hurt.

NHTSA ODI 11499457

Crankcase ventilation valve failure.

NHTSA ODI 11499179

Most M274 engines have P06DA00 fault code internally. Harness for oil pressure regulating solenoid valve is short/open inside the engine oil pan. It can cause excessive oil pressure and premature oil pump failure. As the broken wire is sunken in the engine oil, I worry if it can cause fire. If the oil pump fair during driving prematurely, engine can be stalled. Mercedes-Benz knew the issue but they decided to ignore it.

NHTSA ODI 11497145

Crankcase Breather System: Vent Valve Fault code stored for block crankcase breather valve. The fault code is 052E71. A lot of Mercedes cars are reporting it online and no recall has been made. The labor to change this takes around 8-9 hours and the part costs 300. Company is doing nothing about it as a lot of W205 engines are having this issue

NHTSA ODI 11492970

ode P052E : Positive Crankcase Ventilation Regulator Valve Performance. This seems to be a common problem with the C300.It's not an easy fix. MB hasn't addressed this common issue. Also strong smell of gas coming into the cabin during start up. Took car to Keys Van Nuys Mercedes in North Hollywood and was no recall. We are inhaling these fumes and they blamed it on a hose that expands and fumes escape into the cabin. Wanted to charge for the repair but I refused.

NHTSA ODI 11490718

Check engine light. Code: P052E, positive crankcase ventilation regulation performance.

NHTSA ODI 11488628

The contact owns a 2017 Mercedes-Benz C300. The contact stated while driving 45-50 MPH, the vehicle stalled inadvertently and would not exceed 3 MPH. There was no warning light illuminated. The contact was unable to veer to the side of the roadway. The contact turned on the hazard lights. The contact turned off and restarted the vehicle however, the vehicle would not exceed 5 MPH and was making abnormal sounds. The contact veered to the side of the road for approximately 4 hours until there was no longer traffic on the roadway. The contact proceeded to drive at 5 MPH to her residence less than two miles away. The manufacturer was notified of the failure and assisted with towing the vehicle to the dealer to be diagnosed. The contact was informed that the piston rings had blown out and the engine needed to be replaced. The manufacturer informed the contact that the failure was a known failure; however, she would be responsible of the cost of the repair. The vehicle was not repaired. The failure mileage was approximately 29,650.

NHTSA ODI 11488094

My car threw the check engine code P052E, the issue is the positive crankcase ventilation valve being faulty. Incredibly common on this model and now failed on my car too at 60K miles. All maintenance was done up to this point with the dealer and at or before recommended intervals.

NHTSA ODI 11482918

My car leaked oil very fast while me & my wife were on a trip and it stopped on the highway and engine was stalling and misfiring due to a manufacture defect that is common with this model so it did put us in a very dangerous & risky situation. Now after i paid $1,740 the dealer is saying that my car needs a new engine due to cracked piston in cylinder 1 that damaged the engine which is a common problem with this model around the 50k miles.

NHTSA ODI 11482136

Diagnosis code P052E PCV regulator valve replacement/crankcase replacement. Dealership does not want to acknowledge code while car was under warranty despite proof that it existed when check engine was diagnosed. Now code keeps coming back with check engine light on dashboard. To replace part, the engine has to be taken down since the crankcase is inside the engine. This is a malfunction during assembly/manufacturing, it is impossible to damage part while under usage. Mercedes Benz should be held responsible for part replacement and labor. I urge you to investigate this matter with other clients and ask the manufacturer to replace part and pay for labor.

NHTSA ODI 11471458

misfire cylinder 1 46300 miles on the engine.Mercedes dealer told me I need new engine and they are not providing warranty coverage.

NHTSA ODI 11467297

Check engine light came on, took it to the dealership. It is the Crankcase Ventilation Valve that is once again broken. It helps to accurately depict emissions. It is a known problem that hundreds of other drivers are reporting on forums https://www.benzworld.org/threads/2015-c300-crankcase-ventilation-valve-replacement-p052e71.3047538/page-1 https://mbworld.org/forums/c-class-w205/739851-check-engine-code-p052e.html There needs to be a recall, this is a consumer protection and environmental safety issue.

NHTSA ODI 11467410

CODE PO052E71 crankcase vent solenoid causing check engine light

NHTSA ODI 11464414

P06DA00 CODE oil pump vale circuit open

NHTSA ODI 11464415

At approximately 26,500 miles of use, the check engine light came on in my Mercedes Benz C300. I brought the vehicle to the dealership and they informed me that the diagnosis was a crankcase vent valve malfunction. The MB fault code is P52E71. After paying Mercedes to fix the issue, I found forums on the internet where many other MB owners reported the same issue at around the same mileage. Being that this seems to be a common malfunction with the C300, I believe that it should be considered as a recall issue. I don't know what could have happened if I didn't service the vehicle, but any engine issue is dangerous while a vehicle is in motion.

NHTSA ODI 11461236

When starting the car in the morning there is fuel smell that gets into the cabin. Additionally, as the car is idle during the drive, the smell of fuel is very obvious. Windows have to be rolled down to avoid the smell

NHTSA ODI 11453550

Vehicle won’t start or hard to start

NHTSA ODI 11420137

VEHICLE JERKS VERY VIOLENTLY WHEN ACCELERATING OR USING PADDLE SHIFTERS (IN MANUAL MODE). OTHER OWNERS SEEM TO ENCOUNTER SAME ISSUE

NHTSA ODI 11416040

THIS CAR IS NOT EQUIPPED WITH ENOUGH PROTECTION FOR THE FRONT RADIATORS TO PREVENT DAMAGE FROM DEBRIS. THIS IS A KNOWN ISSUE FOR 2017 AND UP VEHICLES. THE RADIATOR SEEMS TO BE VERY FRAGILE DUE TO THE DESIGN AND THERE HAVE BEEN MANY REPORTS OF THE ISSUE, BUT CLAIMS ARE DENIED DUE TO BEING 'ROAD DEBRIS' BUT MERCEDES-BENZ FAILS TO ACKNOWLEDGE THIS IS A MAJOR ISSUE WITH MULTIPLE CLASSES OF THEIR CARS. MY CAR HAS 27K MILES AND IS JUST OUTSIDE THE WARRANTY PERIOD. THE RADIATOR IS LEAKING IN MULTIPLE PLACES.

NHTSA ODI 11405394

WHEN THE CAR IS IN THE A FEATURE, WHERE IT TURNS ON AND OFF WHEN NOT IN MOTION, IT GETS STUCK IN THAT MODE AS IF A MAGNET IS HOLDING IT IN THAT POSITION. IT WILL NOT MOVE, IT STALLS. I TURN IT OFF AND TURN IT BACK ON AND SOMETIMES IT STILL WILL NOT MOVE, SOMETIMES, IT WILL NOT TURN BACK ON. THIS HAS HAPPENED ON SEVERAL DIFFERENT OCCASIONS. ONCE, I PULLED TO THE SIDE OF MY MAILBOX TO PICK UP MAIL, AND ANOTHER OCCASION I PULLED INTO MY GARAGE, AND IT STOPPED, AND WOULD NOT TURN ON. THIS IS VERY DANGEROUS, I WOULD HATE TO BE IN TRAFFIC, RAILWAY CROSSING, IR STOP SIGN AND THIS OCCURRED. PEOPLES LIVES HAVE BEEN LOST DUE TO THIS ISSUE. ONE LADY WAS HIT BY A TRAIN WHEN THIS SAME SITUATION OCCURRED AND LOST HER LIFE. I AM VERY CONCERNED FOR MY SAFETY AND OF MY GRANDKIDS WHOM I TRANSPORT IN THIS CAR. IT ALSO SEEMS THAT SOMETHING IS WRONG WITH THE GEARS. SOMETIMES, I PUT IT IN REVERSE AND IT SITS THERE. I PUT IT IN DRIVE AND IT WILL NOT MOVE. I FEEL VERY UNSAFE IN THIS VEHICLE. PLEASE HELP.

NHTSA ODI 11402743

CAR STARTED TO VIBRATE AT IDLE THEN GRADUATED TO SHAKING AT ALL TIMES EVEN DURING ACCELERATION. ACCELERATION VERY SLOW, STUCK FEELING. BROUGHT TO MERCEDES AT 28K MILES. THEY STATED IT IS A CRACKED PISTON IN CYLINDER 1. THIS IS APPARENTLY A VERY COMMON ISSUE WITH THIS ENGINE BUT THERE ARE NO RECALLS YET.

NHTSA ODI 11343507

2017 MERCEDES C300 COUPE 49,000 MILES. THIS CAR HAS BEEN TO THE SERVICE CENTER 10 TIMES FOR ENGINE PROBLEMS " VIBRATIING, JERKING, SHAKING AND TICKING" LAST VISIT AT HOEHN MERCEDES,. SERVICE TECH SAID THAT THESE ENGINES AUTOMATICALLY VIBRATE AND JERK AND THAT IS JUST THE NATURE OF THE BEAST?? WTHECK???!! HAVE ALREADY HAD PISTON 1 CRACK AND BREAK, MECHANIC NEVER FOUND THE BROKEN PIECE. CAR IS MUCH WORSE SINCE THAT REPAIR. HOEHNN MB TOLD ME THAT THEY WERE REPLACING THE ENGIBE BUT WHWN I PICKED UP THE VAN THEY SAID THEY DECIDED JUST TO REPLACE PISTON #1

NHTSA ODI 11342812

PISTON 1 CRACKED AT 48,000 MILES. MB TOLD OWNER THAT THE ENGINE HAD TO BE REPLACED BUT WHEN FINDING OUT THAT THE WARRANTY WAS UP AT 50,000 THEY REPLACED THE PISTON INSTEAD. CAR IS STILL SHAKING AT IDLE AND ROUGH RIDE. ENGINE SHAKES AND JERKS.

NHTSA ODI 11337524

THE CAR ENTERS LIMP MODE IN THE HIGHWAY WHERE IT LOOSES ALL THE POWER AND WARNING POPS UP AS ACTIVE BRAKE ASSIST IS INOPERATIVE, TRACTION CONTROL LIGHTS COME ON AS WELL. IF YOU MANAGE TO GLIDE THE CAR TO A STOP AND RESTART THE CAR, THE CAR STARTS TO BACK UP AS NORMAL. TOOK THE CAR FOR SERVICE SEVERAL TIMES, INTAKE AIRFLOW SENSOR WAS REPLACED BUT THE CAR STILL HAS THE SAME ISSUE. UPON SEARCHING ONLINE, THIS IS A VERY WELL KNOWN ISSUE WITH THE NEWER MECEDES CARS WHERE THE CAR GOES INTO A SAFETY MODE WHERE THE ENGINE CUTS ALL THE POWER TURNING THE SITUATION INTO A EVEN MORE DANGEROUS SCENARIO. AS PART OF THE SAFETY MODE, IF THE CAR LOOSES ALL THE POWER, THEN THERE IS FEW THINGS THAT CAN BE DONE TO COME OUT OF IT. THIS IS A MAJOR SAFETY CONCERN AS REPEATED OCCURENCE OF THIS PROBLEM HAS THE ABILITY TO CAUSE A SEVERE ACCIDENT.

NHTSA ODI 11048503

TL* THE CONTACT OWNS A 2017 MERCEDES-BENZ C300. THE CONTACT STATED THAT THE VEHICLE WAS EQUIPPED WITH THE PUSH TO START FEATURE. WHEN THE VEHICLE WAS STARTED, IT VIBRATED ABNORMALLY. THE CONTACT STATED THAT THE VEHICLE WAS TAKEN TO HENDRICK MOTORS OF CHARLOTTE-MERCEDES BENZ (5201 E INDEPENDENCE BLVD, CHARLOTTE, NC 28212, (704) 909-6941). THE CONTACT WAS INFORMED THAT THE VEHICLE PERFORMED AS INTENDED. THE VEHICLE WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 17V114000 (ELECTRICAL SYSTEM, ENGINE AND ENGINE COOLING). THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT CONTACTED. THE APPROXIMATE FAILURE MILEAGE WAS 40.

NHTSA ODI 11022984