2017 MERCEDES-BENZ C 300 Complaints

The valve for crankcase ventilation code P052E71 is not under emission warranty WHY ? 45K car and is not working and it will not pass emission test

P052E positive crankcase ventilation regulatory valve Part number 274-090-17-29-80

Code P052E costing me over $2500 to repair. I’m not the only one dealing with this problem and my car only has 58k miles and it’s a 2017. Should be recalled considering the part being defective.

my 2017 Mercedes C300 experienced what appears to be a very common engine fault with the W205 engine. It involves the "PCV" valve and the engine code fault is P052E. When this fault occurs the engine will stall and sputter. My wife and daughter were in my car last week and it stalled at an intersection which could have resulted in an accident, but luckily the school crossing guards were there to stop traffic and allow her to restart the car and get to the side of the road. The check engine light had previously been on and off for sometime so I had my local Mavis check what the light was on for and they gave me the fault code. I did not think it was anything that serious because the car ran fine. The car was towed today to Mercedes to officially diagnosis the problem

Positive Crankcase Ventilation (PCV) Can cause problem to the engine. Check engine light is on, car have been scanned. This happen one week ago. There’s no recall for this and happen a lot many Mercedes Benz causing problems on engine and is not on warranty or any other recalls

I have a mercedes c300 2017 and recently I was driving my car and the check engine light came on all of a sudden so I took it to my local shop to diagnose it they told me it was the PCV valve, so I called mercedes and they’re telling me that this is not covered and of course my warranty is no longer covered I have about 63k miles on the car. Mercedes is saying they don’t have a recall for this but I’ve googled around and multiple people are saying the same issue happened to them around the 55-65k range. It’s super frustrating that this doesn’t flag a recall.

The contact owns a 2017 Mercedes-Benz C300. The contact stated that while driving at approximately 75 MPH, a loud popping noise was heard and then the sunroof exploded. The contact stated that there were no injuries sustained from the glass shards that had fallen inside the vehicle. No warning lights were illuminated. The vehicle was not yet taken to an independent mechanic or local dealer to be diagnosed repaired. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The approximate failure mileage was 15,000.

Repeated Panoramic Sunroof failure: sun roof rails are have been reported by the dealer to fail / crack and allow panoramic sun roof to dislodge from tracks securing this structure to the vehicle. NOTE THIS IS NOT RELATED TO/ADDRESSED BY THE PREVIOUS RECALL Loud cracking noises heard and the sunroof stuck in an open position and appeared at risk of departing the vehicle on initial occurrence 2019/2020 Dealer attempts to repair resulted in replacement of the rails which are reportedly "made of plastic and do not hold up well in southwestern US temperatures/climate" Repairs/rigging the system appears to "load the rails" and dealer reported life limits can be as low as 10 cycles / 30 months This issue has occurred three times in the past 4 years 92k miles Improper closure/ cracked tracks could result in incomplete cabin security during a roll over and/or potential for the panoramic sunroof to depart the vehicle to become a threat to other traffic.

My preowned vehicle has a strong gas odor in the cabin while operating. I don’t see any safety recalls but I did read online that a class action lawsuit proved my model may have faulty fuel parts causing seepage and the watranty is extended to 10yr/120k miles. I have scheduled maintenance this week but would like to be certain the warranty will cover this. Thank you.

Engine code P052E - PCV REGULATOR VALVE PERFORMANCE. Common faulty Mercedes Benz part integral to the car. Just took in the car to MBSeattle.