general problems of the 2017 Mercedes Benz C300 - part 2

I purchased my 2017 C300 class mercedes-benz ("mb") in may 2021 from a used car dealership in mobile, al. At that time it had 36,000 miles. Less than 2 years later, on or about 12/15/22, as I was driving, the mb suddenly and without warning began to vibrate violently and immediately lost power. The car had @54,000 miles on it. I routinely drive interstate to and from work and had just gotten off of the interstate. I was lucky that I was driving at a low speed when this happened; otherwise, a serious accident could have resulted. I took it to the local mb dealership which told me that the car failed a compression test in the #1 cylinder and that the engine would have to be replaced. Subsequent research on the cause of this total engine failure with low mileage revealed that this engine has a chronic piston defect that damages the #1 cylinder, causing it to lose compression, and that mb has known about the defect for many years, an issued an internal bulletin about it. Mb has not alerted the public nor instigated a recall. I was not informed by mb at any time that the C300 class engine had a chronic piston defect that would damage the #1 cylinder which would, in turn, cause the engine to lose power and the vehicle to vibrate and shake, creating a dangerous diving condition under all circumstances, but especially if the car was being driven at speed on a federal interstate highway. Despite demands by me and others, mb refuses to responsibly address the issue. The driving public is, and remains, clearly, in great risk of harm due to this defective engine and associated power train issues. It is patently unreasonable for mb to produce and market such a unsafe, dangerous and defective product that poses an unreasonable risk of harm to its customersand others when being used as it was intended. I understand that the NHTSA has opened an investigation on this defect and wish for my voice to be heard on it. Please contact me [251-753-5182] for further details.

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.

Hey good morning. There’s been a been a system failure. P052e positive crankcase ventilation regulator valve performance. Warning message I got was the engine light showed.

Crankcase ventilation valve failure.

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.

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.

Piston one issue. I bought this car from an auction and according to the record on the car the previous owner had problem with piston one and low compression in that piston. After performing some research it looks like mercedes’ benz C300 m274 is riddles with this issue. It’s all over the internet and I don’t know why mercedes is not taking responsibity for this. This car has less than 70000 miles and the engine is locked from the cylinder. Thank you.

The contact owns a 2017 mercedes-benz C300. The contact stated while driving at 45-50 mph, the vehicle stalled inadvertently and would not exceed 3 mph. The contact turned off and restarted the vehicle. However, the vehicle would not exceed 5 mph and emitted abnormal vibrating sounds. The contact veered to the side of the road. The contact proceeded to drive at 5 mph to her residence that was 2 miles away. The manufacturer was notified of the failure and provided assistance with towing the vehicle to the dealer where it was diagnosed that the piston rings blew out and the engine needed to be replaced. The vehicle was not repaired. The failure mileage was approximately 29,650.

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.

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.

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. . Read more...

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

Code po052e71 crankcase vent solenoid causing check engine light.

P06da00 code oil pump vale circuit open.

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.

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.

Vehicle won’t start or hard to start.

My C300 2017 only had 55k and suddenly the engine light on, when I check it show that I need positive crankcase ventilation valve replace. It cost $2300.

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.

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.

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.

"takata recall" I had my 2017 Mercedes Benz C300 fir only a few months and I have experience 4 encounters as to where my vehicle wouldnt start back up while sitting inside of my vehicle for at least 2 to 3 mins its like being locked inside of my own car everything completely shuts down the engine nor push start wouldnt work my car is always parked for small periods of time wgen this incident took place I took it over to the mercedes-benz dealer and I was told my car is new and it does that time to time.