What 125 owners told NHTSA about the 2018 Mercedes-benz C-class

Was sold Car Feb,27,2024 from dealership the car violently vibrates at 60mph took it to 3 Repair shops

NHTSA ODI 11596485

P052E positive crankcase ventilation regularly valve

NHTSA ODI 11595996

I am wanting to add information to my original complaint. Tracking#11589822 When I called in the electrical issue to AAA the agent said this is a common problem on these cars. Next, I want to add photos the Mercedes of Fresno service department sent me during the 2nd time my car was taken in to be checked. I honestly don't remember off hand when the collision occurred, I have that paper work somewhere. I will find it and send it in also. I will also get paper work from the auto body place that fixed as much of the wiring that it could. There was also a video on line I will try to find again and send that in.

NHTSA ODI 11591967

Car needs an engine rebuild at 90K miles due to a cracked piston #1, a problem with a car that received regular oil change intervals and proper service should not have

NHTSA ODI 11590907

While I was driving to work in a heavy rain my abs malfunction light came on in my car. I decided to take it to the Mercedes-Benz dealership in Fresno. They said it was the ABS module that needed to be replaced. After being in the shop for almost 3 weeks they said it was fixed. When I went to pick it up, the moment I turned it on the ABS malfunction light came on again. I was told that it was okay to drive and they would have somebody come check it out at my work the next day. My car went back into the shop for another week and they could not figure out what was wrong with it. They did take pictures and the second time I took it in they noticed a bunch of water underneath the floorboard. By this time, I had lost confidence in them fixing my car the manager basically kicked me off the lot and told me never to go back again. So I continued to drive my car since I was told it was okay first time they fixed it. Short while later, I rear-ended another car. The ABS system did not warn me that I was too close. When I took my car in to get the body work fixed I was also given a name of somebody who would be able to fix the electrical problems and insurance would pay for it. He was able to fix the ABS system but could not find where the short was that controlled the passenger seat and the driver side back seat window and for the needle that tells me if my car is overheating. Nobody could figure out where the water had been coming from. It wasn't until recently when we just had a heavy storm that I noticed water leaking from inside the car through a seam. The running boards on the top of my car were not installed correctly so water seeps in there during rains and then it travels down underneath my floorboards and sits which was the cause of the shorts in my electrical system. My concern is that I don't know how bad other components of the car might be that one of the wires might at any of the wires might short while I'm driving now but unable to download receipts which I have

NHTSA ODI 11589822

The contact owns a 2018 Mercedes-Benz C300. The contact stated while driving at approximately 65 MPH, there was a windy sound coming from the front of the vehicle. The contact then noticed the sound of an impact on the rear driver's side of the vehicle. The contact pulled to the side of the road and noticed that the front roof panel had separated and had struck the rear driver's side of the vehicle above, the wheel. The contact was able to continue driving. The vehicle was taken to an unknown dealer, where it was determined that the failure was related to NHTSA Campaign Number: 23V854000 (Structure) however, the VIN was not included. The dealer informed us that the repair would be an out-of-pocket expense. The insurance company towed the vehicle to an independent mechanic for the repair. The vehicle was being repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was unknown.

NHTSA ODI 11586820

Very common problem on all Mercedes - code P052E - second time on this car. Engine light, 2nd time on this car. Car is 2018 and has 45k miles. First time it was at 28037 miles. This is a MAJOR issue costing consumers $1500-$2500 to repair and needs a recall from manufacturer

NHTSA ODI 11584844

CODE'S P052W-71 & P060A-00 THESE'S CODES HAS BEEN AN ISSUE WITH MERCEDES BENZ FOR QUITE SOME TIME NOW... ITS BEEN COMPLAINTS AFTER COMPLAINTS AND MERCEDES BENZ HAS NOT TAKING OWNERSHIP OF THE ISSUE.. THIS IS DEFINATELY A RECALL PLEASE LOOK INTO THIS I CAN BE REACH AT [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11579237

The Valve for crankcase ventilation has a malfunction. The actuator is blocked.

NHTSA ODI 11579025

Error code P052E Positive crankcase ventilation regulator valve performance

NHTSA ODI 11577820

Sun roof not opening. Mechanic notified me that this is a known issue, but no recall at this time.

NHTSA ODI 11577235

I have 33,000 miles on the vehicle and the check engine light came on. The code P052e came up Positive Crankcase Ventilation Regulator Valve Performance. I’m reading that many people have the same issue but there is no recall. Is there anything that can be done?

NHTSA ODI 11573044

There are Water intrusion that happened to other Model of Mercedes, my car have the same problem, when i bring it to the Mercedes dealer, they found a lot of water inside the trunk, but they insisted that I had accident, but there no accident that I know of.

NHTSA ODI 11570616

Check engine light code is positive crankcase ventilation regulator valve

NHTSA ODI 11569984

Positive crankcase ventilation assembly replacement. Pollutes the environment.

NHTSA ODI 11569234

C300 Crankcase Ventilation Valve Code P052E

NHTSA ODI 11568891

An Engine Code P052E (positive crankcase ventilation regulatory valve) appeared and the vehicle only has 50K on it

NHTSA ODI 11568243

The contact owns a 2018 Mercedes-Benz C300. The contact stated that while driving at an undisclosed speed, there was a message was displayed that there was a light bulb malfunction. The contact stated that the rear turn signal lights and brake lights were not operating properly. Additionally, the contact stated that the fuel door failed to operate properly, and occasionally opened independently while driving. The vehicle was taken to a local dealer, where it was diagnosed and determined that the cause of the electrical issues was water in the spare tire compartment. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 52,800.

NHTSA ODI 11564953

The contact owns a 2018 Mercedes-Benz C300. The contact stated that the rear windshield had detached from the vehicle. The vehicle was taken to the dealer, where it was diagnosed that the windshield bonding had detached and needed to be responded. The vehicle was not repaired. The manufacturer was made aware of the failure but informed the contact that the VIN was not included in NHTSA Campaign Number: 18V608000 (Visibility). The failure mileage was approximately 70,000.

NHTSA ODI 11559736

Panoramic roof suddenly shattered while driving on a clear day.

NHTSA ODI 11558978

The contact owns a 2018 Mercedes-Benz C300. The contact stated while attempting to close the sunroof, the sunroof failed to close properly. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 21V197000 (Structure) but the VIN was not included. The manufacturer was notified of the failure, and a case was opened. The failure mileage was 45,000.

NHTSA ODI 11551799

My car was diagnosed with positive crankcase ventilation regulator valve performance failure. This should be recalled by the manufacturer because many c300 are having this very same issue.

NHTSA ODI 11551029

Check engine light appeared.I took it to Mercedes and they said the crankshaft was faulty. I had to repair it and it cost me about $1800.00.

NHTSA ODI 11550481

Engine code: P052e - the widest spread engine issue on Mercedes which fails emissions testing. Crankcase ventilator issue which leads to stalling.

NHTSA ODI 11548498

Positive crank case valve failure. Check engine light on. Mechanic started this was extremely common and a costly repair on lower mileage Mercedes Benz vehicles. Mercedes Benz forums also mention this is extremely common and frustrating. This happened at slightly over 50k miles on my vehicle. Error code P052e

NHTSA ODI 11546676