2018 Mercedes-Benz C-Class
Problems, recalls and owner-reported issues
Engine is the leading concern among 130 owner complaints filed for this model year. This is the 15th highest complaint count among 23 C-Class model years with reports.
Of the 2018 reports, 5 involved a crash. 2 people were injured.
What owners report most often
Recalls and investigations
No safety recalls on file.
Representative owner complaints
130 reports, newest first.
Steering, Sep 9, 2024
car has less than 34,000 miles on it. One day went to drive and the vehicle wouldn't turn and an error message popped up "power steering malfunction, check owners manual" Had it towed to dealer and they said they couldn't find anything wrong with it. According to the dealer, no sign of wear and tear, no physical damage,
Steering, Aug 22, 2024
The contact owns a 2018 Mercedes-Benz C300. While driving at various speeds, the contact could hear an abnormal sound from the transmission. The vehicle was taken to a local independent mechanic where it was diagnosed that the rack and pinion needed to be replaced. The vehicle was not repaired. The vehicle was then taken to a local dealer for diagnosis, but the failure could not be replicated. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 57,000.
Latches/locks/linkages, Aug 6, 2024
The contact owns a 2018 Mercedes-Benz AMG C63. The contact stated while attempting to refuel the vehicle, the fuel tank door would not open unless the excessive force was used. The failure occurred on several occasions. The vehicle was taken to a local dealer where it was diagnosed that the fuel tank door failure was a known manufacturing failure. The fuel tank door was replaced by the dealer on several occasions but the failure recurred. The vehicle was temporarily repaired with wiring to prevent the fuel tank door from closing. The manufacturer was made aware of the failure. The failure mileage was approximately 20,000.
Engine, Aug 2, 2024
I need the Crankcase ventilation valve replaced and have heard many complaints about this repair.
Other or unspecified, Engine, Jul 27, 2024
The day after I purchased my c300, the engine light popped on. I went back to dealer and they said it was a recall because of a crank case (PCV). I was upset because they never said anything about it. This was April of 2024. Note:(This Dealer was not Ray Catina’s of Edison). I went to Ray Catina’s in Edison for them to inspect car and I have been calling because I was told it was a national recall and it was on back order and should be here in June. It is now almost August and I called on the 23rd of July and received a call from Ray Catena on the 24th for them to tell me that “they were told that the new plan from Mercedes is to bring my car in and they will clear code. That’s what they are told to do.” To me, this is NOT fixing the issue. I am a little aggravated because I bought my car on [XXX] and have NOT been able to feel good because not sure what ramifications will come with me driving my car with this issue. I was told that driving with this engine light on and code that it will not harm my car. They now say Mercedes was told to reset the code and that will resolve issue? I believe this is a band aid not a fix!!! I’m a little upset. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Other or unspecified, Jun 25, 2024
Was sold Car Feb,27,2024 from dealership the car violently vibrates at 60mph took it to 3 Repair shops
Engine, Jun 23, 2024
P052E positive crankcase ventilation regularly valve
Electrical system, Structure, Forward collision avoidance, Jun 2, 2024, crash
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.
Engine, May 27, 2024
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
Structure, Forward collision avoidance, May 21, 2024, crash
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
Structure, May 3, 2024
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.
Engine, Apr 23, 2024
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
Engine, Mar 25, 2024
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)
Engine, Mar 23, 2024
The Valve for crankcase ventilation has a malfunction. The actuator is blocked.
Engine, Mar 16, 2024
Error code P052E Positive crankcase ventilation regulator valve performance
Other or unspecified, Mar 13, 2024
Sun roof not opening. Mechanic notified me that this is a known issue, but no recall at this time.
Engine, Feb 20, 2024
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?
Other or unspecified, Feb 7, 2024
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.
Engine, Feb 5, 2024
Check engine light code is positive crankcase ventilation regulator valve
Fuel/propulsion system, Feb 1, 2024
Positive crankcase ventilation assembly replacement. Pollutes the environment.
Other or unspecified, Jan 30, 2024
C300 Crankcase Ventilation Valve Code P052E
Engine, Jan 27, 2024
An Engine Code P052E (positive crankcase ventilation regulatory valve) appeared and the vehicle only has 50K on it
Electrical system, Exterior lighting, Jan 11, 2024
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.
Visibility, Dec 12, 2023
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.
Other or unspecified, Dec 7, 2023
Panoramic roof suddenly shattered while driving on a clear day.