2017 Mercedes-Benz C300 complaints

Panel between front windshield and sun/moon roof was vibrating loose as well as the clear coat completely peeling off the piece. The car is only at 57k miles so this should NOT be occurring. That piece felt like it will fly off while driving. Unsafe.

The contact owns a 2017 Mercedes-Benz C300. The contact stated that while at a stop light the vehicle stalled. There were no warning lights illuminated. The vehicle was taken to the local dealer where it was diagnosed and determined that the battery cable needed to be replaced. The vehicle was repaired but the failure recurred. The vehicle was taken back to the local dealer where it was diagnosed that an update to the powertrain software was needed, and the transmission pump needed to be replaced. The vehicle was repaired but the failure persisted. The contact called the local dealer, and it was recommended that the transmission be replaced. The vehicle was not repaired. The manufacturer was contacted. The failure mileage was approximately 80,000.

Check engine light on on 2017 Mercedes C300 4 Matic. Car has 52,000 miles on it. The code P052E71 was diagnosed by Mercedes mechanic as the valve for the crankcase ventilation. The actuator was blocked. Mechanic said part (crankcase ventilation hose) is not available and this problem happens to all 2015-2017 C 300 models usually around 50,000 miles. When air conditioning or heat is run it causes an odor of burning fuel or oil in the cabin. Mercedes said part is not in stock and they have no ETA on when it will be available. Vehicle is unable to pass vehicle emissions test.

My Mercedes benz C300 2017 have the P052E positive crankcase ventilation regulatory valve, and Mercedes Benz they start sending this letter and when I go to the dealer they said my car not qualified, but the letter says other thing, my car have the check engine light on with the code PO52E. They don’t want to do the repair because is a $2,500 repair and they making excuses to not do it.

The contact owns a 2017 Mercedes-Benz C300. The contact stated while driving 65 MPH, the sunroof exploded inadvertently. The contact stated that the shade guard was closed when the failure occurred. The contact had not sustained any injuries. The contact continued driving at slow speeds, and there was glass falling on the road while driving. The vehicle was taken to the dealer, who provided a cost for the repair. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and informed the contact that they could not assist because the VIN was not included in a recall. The failure mileage was approximately 75,000.

P052E Positive Crankcase Ventilation Regulator Valve Performance this is a common issue with Mercedes as lots of car are affected by this and this should be covered under emission but lots of dealership are declining saying it’s not covered under emission warranty but this code cause pollution and this part is so expensive to fix and I paid 2k to fix it last year and that same code came again. We can’t keep paying 2k plus for something Mercedes fault design Please help us and make Mercedes Recall this Part

P052e..PVC ventilation crank shaft valve sensor, too many people all reporting the same expensive item/ labor intensive work by a dealership just after the warranty expires. Help. There are thousands of us with the EXACT SAME CODE AND PROBLEM!! ORDER A RECALL INVESTIGATION!! PLEAS?!?!!!

The contact owns a 2017 Mercedes-Benz C300. The contact had received notification of NHTSA Campaign Number: 21V032000 (Seat Belts). The vehicle was taken to a local dealer and the recall repair was performed; however, upon retrieving the vehicle, the check engine warning light illuminated upon starting the vehicle. The vehicle was taken back to the dealer and remained in the dealer possession. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 34,000.

The contact owns a 2017 Mercedes-Benz C300. The contact stated that while driving 60-65 MPH, the vehicle made an abnormal whistling sound. Additionally, the contact stated that while the vehicle was at the car wash, and she became aware that water was leaking inside the vehicle through the windshield bonded panel. An independent mechanic was contacted and informed the contact that the front windshield bonded panel could have detached; however, the vehicle was not diagnosed nor repaired. The dealer was not notified of the failure. The contact related the failure to NHTSA Campaign Number: 21V197000 (Structure); however, the VIN was not included. The manufacturer was notified of the failure and informed the contact that they could not assist because the VIN was not included in the recall. The failure mileage was unknown.

Check engine light came on. Error code indicates a PCV crankcase ventilation valve has malfunctioned. Code is P052E. This is a notorious problem with Mercedes, BMW and other European cars. It should also be considered part of the emissions system. Contacting the MB dealers, I cannot get a clear definition whether it is covered by extended warranties or any warranty whatsoever. They are vague as to "maybe, but not sure". I feel that there should be a recall to fix the defective parts involved with this error code.

P502e code crankcase ventilation failure

The contact owns a 2017 Mercedes-Benz C300. The contact stated that while starting and driving the vehicle, the electric power steering was inoperable. There were no warning lights illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. The contact stated that the failure was related to NHTSA Campaign Number: 17V243000 (Steering). The failure mileage was approximately 25,000.

While driving on the freeway car pool lane with my wife, a sudden vibration in the front tires was observed, the car felt like it was pushed to the right then to the left even though it was in the center of the lane. Told my wife, "something is wrong with the car!" Thinking that I may have had a flat tire, I slowed down, the car went into a violent flat spin until the right rear end of the car hit the center lane divider. Airbags deployed. 911 was called, we were assisted by Highway patrol to the other side of the freeway. As the car was put on a flatbed tow truck, the tow truck driver commented that one of the front wheel was not turning. We found out that the right rack and pinion broke. The car was declared a Total Loss.

During cold starts the fuel injectors/clamps leak causing strong gasoline smell inside the cabin. After research online this is a common issue with W205 systems. I am beyond surprised this has not been investigated and reported as a safety recall as it can pose a fire hazard. Please investigate and Mercedes should be fixing this issue….

After approx 24,000 miles and 18 months, I was told all four tires needed to be replaced and were down to between 3/32nd and 2/32nd tread left on all four tires, despite regular rotations, alignment, and overall car maintenance. These were purchased at Mavis in East Brunswick, NJ in May, 2022 and we were notified of the tread wear after a regular maintenance appointment at a Mercedes Benz dealer. I notified Mavis and came in for them to measure tread depth, which was found to be in the unsafe range. Mavis is only offering me warranty coverage, based on mileage used, of a total of $360. Obviously, this is a manufacturer defect since all four tires wore so quickly and evenly. I was told there is a 40,000 mile warranty.

Every winter this car will have a heavy smell of gas in the engine and the cabin, after driving it for around 15 minutes with the windows open in the cold it goes away. no problem in the summer time. My mechanic said it's a common problem with these cars.

There is a short rubber fuel line/hose in the engine compartment that is attached with compression clamps; the hose connects the fuel line from the gas tank to the high pressure fuel pump. When it gets cold outside (below ~40 degrees Fahrenheit) the clamps loosen a bit and the hose will leak gas The entire interior smells like gasoline, really bad.

P052E PCV Regulator Valve Performance

Positive Crankcase ventilation

Code p052e came on randomly.

The glass panel between the top of the windshield and the front of the glass sunroof suddenly detached from the car. I was driving on the I-5 freeway at 70mph when the panel detached without warning. By the time I had safely pulled over I could not safely walk back to see if I could find the panel. The freeway was busy, I do not know if the panel struck another vehicle. It looks like the adhesive that holds the panel on has failed.

My vehicle started shaking and the check engine light came on. It's a PCV valve

I have a 2017 C 300 and it smells like gas when I turn my heat/ac on. I contacted Mercedes to see if there was a recall as this is a huge issue with many customers but Mercedes offered no assistance. The smell of gas is very dangerous and I think it's unfair to the customers that Mercedes has known about this problem but chose to do nothing.

Front safety system inoperable

The contact owns a 2017 Mercedes-Benz C300. The contact stated while the vehicle was parked in the driveway, the driver’s side seat belt failed to retract as designed. The contact stated that the seat belt was loose. There was no warning light illuminated. The vehicle was taken to the dealer to be diagnosed, but the vehicle was not yet diagnosed. The vehicle had not been repaired. The manufacturer was not made aware of the failure. The contact referenced NHTSA Campaign Number: 21V032000 (Seat Belts) as a possible cause for the failure. The failure mileage was approximately 8,000.

I took my vehicle to the mechanic due to the check engine light been on. The diagnostic came back to be that "The valve for crankcase ventilation has a malfunction. The actuator is blocked." As per mechanic this has to be replace but cost around $ 2,000 plus.

Factory AMG rims. 3 of the 4 rims have cracked. The last rim cracked with brand new tires. So it is not a tire issue. I find it unbelievable looking online how may others have had this problem with AMG rims. Does not seem acceptable.

Check engine light came up for a PCV valve error. Car was driving fine with no recent changes and the repair is going to cost over 2000$.

My engine light comes on intermittently for days or weeks at a time. Code is P052E indicating an issue with the PCV valve. I'm waiting to replace the part.

P520E code which is caused by a crankcase ventilation issue. The fix costs upwards of $2000. It seems to be a common issue with Mercedes vehicles with 4 cylinder turbos and should be a recall on this system.

The vehicles panoramic sunroof does not close fully. There is a recall for certain Mercedes-Benz 2015 - 2020 C300 vehicles, my car is a 2017 C300, but for some reason my vehicle is not part of the recall. The recall number is 21V197000.

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 Crankcase Ventilator Actuator has malfunctioned, resulting in the Check Engine light showing up. The MB C300 4matic 2017 vehicle is at 40,200 miles as of [XXX]. Lot of other MB owners have reported same issues. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

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.

The contact owns a 2017Mercedes-Benz C300. The contact stated that upon having the vehicle inspected, the check engine warning light illuminated. The vehicle was diagnosed and produced code: P052E. The vehicle was then taken to an independent mechanic where it was diagnosed that the Positive Crankcase Ventilation (PCV) failed and needed to be replaced. The vehicle was repaired. The dealer and manufacturer were notified of the failure and confirmed that the VIN was not included in a recall. The failure mileage was approximately 53,000.

Piston crack in Cylinder 1

The contact owns a 2017 Mercedes-Benz. The contact stated that while driving at an undisclosed speed, she attempted to open the sunroof, but when she looked, she noticed that only the left side was open. The contact stated that the failure reoccurred on two occasions. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.

At approximately 48,000 miles driven the check engine light turned on when car was taken to the mechanic, code p052e71 came back as the problem, which means crankcase breather hose had to be replaced. the cost was almost 2000 dollars.

My Mercedes Benz stopped working. The mechanic shared it involves the: fault valve for crankcase ventilation has malfunction.

The contact owns a 2017 Mercedes-Benz C300. The contact stated while driving 75 MPH, the front roof panel located between the windshield and the panoramic sunroof detached and flew off the vehicle. The vehicle was taken to the dealer and the contact stated that the vehicle had experienced the failure listed in NHTSA Campaign Number: 21V197000 (Structure) however, the VIN was not included in the recall. The vehicle was not repaired. The manufacturer was contacted, and a case was filed. The failure mileage was 41,700.

Basically, this is a common problem with the c300 coupes, I had an recall to replace front stationary sunroof panel. My sunroof panel started lift the last few months in 2022, therefore I took it to the dealership at the start of 2023 which they notified me this was a big problem and was unsafe on the road because it will eventually lift off while driving. Sense my engine lights were on and needed immediate attention, I had my car service which cost a lit of money. I had one problem about why would I be charged $400 for windshield seal which I assume was apart of the problem with sunroof panel seal. After car was in shop for quite some time, they fixed my sunroof panel that had an recall. About a month later, the sunroof panel was lifted and started to come off. I brought the car back into service which service advisor notified that he ordered about sunroof panel. I called the service advisor about once a week to check sunroof panel but I kept getting the run around for months. Finally, recently I went to another dealership and they told me that about 30 sunroof panel were in stock at near by warehouse which means the previous dealership was not trying to fix the problem but were happy to charge me 8k to fix my car. Please I need help with this situation and I will attach photo of invoice. Please I want to know of I can have another recall on the same particular problem. Thank you

Unknown

I got a check engine lite and the code said positive crankcase ventilation regulator valve. While doing research I am finding out that this is a very common problem on these cars, and very expensive to fix, I’ve never even heard of this problem happening to other cars. I think a recall is in order, thank you

Code PO52E

Check engine code P052E : Positive Crankcase Ventilation Regulator Valve Performance. This is a common problem in all mercedes 2015-2020 and it cost about 2000 to repair. This should be a recall.

My car is throwing the error code P052E. It keeps going on and off.

Egine light on need to replace clogged Pcv value at 48,000 miles. Seems like this part needs a recall

I recently had to repair a part of my engine with the code P052E. It specifically was "The Valve for Crankcase Ventilation. It stated it was malfunctioned and that the actuator is blocked. It could have caused my engine to fail and my car to stop at any moment putting myself and others at risk. There is a large amounts of consumers with the same vehicle that complained about the same issue. It was inspected by the Mercedes Benz dealership. The only warning was that my check engine light was on.

On May 3, 2023 I experienced an issue in which the sunroof on my 2017 C300 cert pre-owned with 51,000 miles Benz imploded out of nowhere while driving. My dad who I was taking to the doctors was also in the car resulting in both of us having fragments of glass on us. The problem has been reported to the insurance company and dealer the same day. There were no issues with the sunroof before the event happened.

I’m unsure but my check engine light came on showing something about my pvc valve needing replacement while I was driving