2015 C300 Crankcase Ventilation Valve Replacement P052E71 NEED TO BE REPLACED, ENGINE LIGHT COMES ON. ONLY HAVE 37,000 MILES MANY REPORTS OF THIS ISSUE

- Farmington, MN, USA

My son's car was blowing white smoke out of the exhaust and had a sweet burning smell and the check engine light came on. The crankcase vent valve is needing to be replaced on this 2015 C300 Mercedes Benz and many owners of this same type of car (different year) are posting about it. Owners of these types of cars are saying that replacement is happening more than once! That it's a common defect of these cars. My son has less than 100,000 miles (61,000 if that) and this shouldn't be happening. And, it's time someone does something to protect the consumer. Mercedes-Benz dealers are taking advantage of consumers and charging ridiculous prices to replace this part, but the part shouldn't be breaking. It's a safety factor in that it can affect driving, there's risk of blowing valves/valve cap and engines, including loss of the vehicle and nowadays no one can afford to buy a new car or even a used one! Consumers buy what they think is a reliable vehicle but Mercedes isn't taking care of their customers. Mercedes-Benz should be forced to do a recall and replace these faulty parts. Read other complaints here: https://www.benzworld.org/threads/2015-c300-crankcase-ventilation-valve-replacement-p052e71.3047538/page-2

- Alamosa, CO, USA

When start the engine, or idling, it smell gasoline in the cabin so bad.

- Houston, TX, USA

The car smell like gasoline inside, the gas hose connecting the high pressure gas line to the gas tank is licking due a bad connectors

- San Jose , CA, USA

Check engine light came on and strong fuel smell. Crankcase ventilation malfunction code was verified by dealer.

- Denton, TX, USA

When driving I accelerated and then the engine light turned on. after that the car was jolty and turned off completely when stopped. had to force a restart at the light. code that came back was p052E. This is a major and common issue with these cars. part is 400+ dollars. labor is much more since this is a 6 hour job. the work to replace this part is incredibly intensive that makes it impossible for regular car owners to change. Mercedes refuses to recognizes this as a common issue. but the truth is they designed a faulty system that they claim to have updated a handful of times now.

- Chicago, IL, USA

Strong Gas Smell when heater comes on. Could be hazardous due to breathing in Fuel Fumes

- West Hollywood, CA, USA

I have an emissions related Check Engine Light (P052E71) relating to the Evaporative/Crankcase ventilation system. I think this should be a Recalled/Warrantee item on the 10 year/100,000 miles federally mandated guarantee. Please advise...

- Northport, NY, USA

2015 Mercedes C300 crankcase ventilation regularly valve is garbage, have to spend around $2K to get it replaced. Very common issue for this model.

- Portland , OR, USA

Code P052E

- Hollister, CA, USA

Positive crankcase ventilation valve. Known issue with manufacturer

- San Jose, CA, USA

Strong odor of fuel in the cabin when entering the cabin and stronger when vehicle is first started

- Schenectady, NY, USA

Check engine lite with code P052E that is "Positive Crank Case Ventilation Regulation Valve Performance" at around 65K miles. This might pose danger with engine failure. the problem has been confirmed by an independent service center. Dealer said that this problem is common to the year and model of my car and that the manufacturer has replaced this piece in newer models. Since the manufacturer already know this issue and replaced the piece with a better one for newer model. I believe this part should be recalled and replaced by the manufacturer. it is crazy amount of money for the consumer to fix this.

- Portland, OR, USA

PCV valve

- Portland, OR, USA

2015 C 300 Mercedes Benz Crankcase ventilation/ oil separator is bad. Vehicle has only 50,000 miles. Please help, Mercedes should have this on recall, a lot of people has this same issue. Thanks

- Broadview , IL, USA

Got error code P052E when performing state inspection for my car. This looks like "Positive Crankcase Ventilation Regulator Valve" issue and have seen lot of people who owns Mercedes Benz reported this issue.

- Charlotte, NC, USA

Only have 35,000 miles and received positive crank case valve

- Moonachie, NJ, USA

Looks like I am not the first one to complain about the strong smell of fuel on the driver side under the hood as well as inside of the vehicle. Upon further inspection it was determined that the fuel line at the pump is leaking fuel. My car has only 48k miles on it...How can such dangerous failure be ignored by MB for more than three-four years or longer?? Please note that this particular issie is leading the complaints chart. Based on the amount of identical complaints, it appears that this "manufacturer" is waiting for an injury or fatality before they do something about it. This fuel hose situation MUST be addressed IMIDIATELY. Please start the recall before it is too late!!!

- Louisville, KY, USA

When I got my Mercedes 2.5 years ago I would always notice a very strong gas smell that would come very randomly. I would have to open my windows for the smell of fuel to go away. I presented this to the Greenway Mercedes Dealership 2X VERBALLY and they told me that it is just a "Mercedes thing" and everything is ok because it is not "VISIBILLY" leaking fuel. Which it was not. However, the smell of the fuel is EXTREME, It would happen to me through out the year (in the summer and winter, regardless of temperature) randomlly. I would have to leave the garage ASAP when I turn on my car just in case the smell of fuel was extreme because my parents would tell me that it would even COME INTO THE HOUSE. I thought I was crazy to think this was normal and just a "Mercedes thing". But then I got a letter on August 2021 and did some research and saw I was not the only one and there is a class action lawsuit -Mercedes sent a letter on August 21 announcing they will extended the limited warranty of the "Fuel hose connected to high pressure fuel pump" from the original warranty of 4 years/50,000 miles to 10 years/120,000 miles. HOWEVER, This does NOT HELP, they are still saying it is a wear and tear and REFUSE to replace the defected MANUFACTORER part and INSIST it is not "seeping fuel" from the connection at the fuel pump, so it is NOT under warranty. I am confused as to why this is not a recall? Extending the warranty did nothing to help Mercedes Owners at all. They continued to claim it is "wear and tear so that is why the fuel is sweeping at a different location" AS WELL, two dealerships told me it would take them 24-48 hours for them to JUST INSPECT my car to see if it is covered. This extension did resolve anything, but made sure the dealerships deny even more. Now, I have to continue to leave my garage within 30 sec. so I don't suffocate the cats that sleep in the garage or have my family smell the fuel as I leave. And to open my windows so I can breath fresh air.

- Spring, TX, USA

Car has 51,000 miles, no check engine light or any other warning light.driving in on the freeway at 70 mph when I hear a pop sound and my car loses power, I pushed on the gas and it started to shake violently and I panicked as the construction on the freeway was not allowing drivers a shoulder to pull over on. I was lucky enough to be driving at 2am and with the construction going on, drivers were already slowing down. My car also started blowing a thick white smoke through the back exhaust that could have made it harder to see that late night as it was already foggy here in California. At first I didn-€™t realize I was smoking through the back until my car began smelling like burnt oil. I wasn-€™t able to get off the freeway until the next exit all while thinking that my car was going to explode from the smell of the burning oil. When I pulled over and got out of the car I made sure I didn-€™t see any fire and then I waited to let it cool down, opened the hood and saw oil everywhere. I had it towed to Mercedes and I got the problem and the estimated cost to repair it. The problem turned out being a cracked piston in cylinder one, when it cracked it allowed oil to mix with the gasoline and that-€™s what was causing all the white smoke out the rear, the burnt smell was from the oil that was leaked all over my engine getting too hot from the engine. I found out a few days ago that Mercedes-€™ has a technical billeting regarding a faulty wrist pin that was causing the pistons to eventually crack. In the bulletin the faulty pin problem is fixed by replacing all the pistons and adding a upgraded pin and many other parts. So there are many other drivers that are experiencing this and driving with faulty wrist pins. Prior to all this happening the car always made a tap tap tap sound from engine and Mercedes-€™ said it was normal for 4cylinder turbos to make this sound, sounded like a diesel. But it turned out being from the loose wrist pin. Mercedes lied to us. THE CONSUMER REQUESTED THAT MERCEDES BENZ VEHICLE

- Chino, CA, USA