2015 Mercedes-Benz C-Class owner complaints

Loud engine knocking when engine is cold. Diagnosed as incorrect/unfavorable tolerances of piston wrist pins that will ultimately lead to engine failure. Diagnosis happened with odometer at 2,438 miles.

The dealership is staying I have an issue with the crankcase valve vent and this seems to be a known issue effecting years 2015-2018.

Tl* the contact owns a 2015 Mercedes-benz c300. The contact stated that the engine had been shutting off ever since the vehicle was purchased in 2016. In addition, several unknown warning indicators would illuminate for no reason. Mercedes-benz of georgetown (7401 s interstate 35, georgetown, tx 78626, (512) 930-6150) stated that the engine was defective. The dealer stated that they previously repaired the engine under warranty and would not do it again. Mercedes-benz of austin (6757 airport blvd, austin, tx 78752, (512) 220-0940) called the other dealer and informed them not to repair the vehicle. The vehicle was not repaired. The failure mileage was 20.

2015 Mercedes C300 crankcase ventilation regularly valve is garbage, have to spend around $2K to get it replaced. Very common issue for this model.

Bought used Mercedes c300 2015 4matic on feb'2019, odometer reading was 44k miles with clean carfax report. After driving just about 7k mikes more, at 53k mikes car shows engine warning. This is unfortunate from mercedez that with this much of nirmal use, car is having engine issues.

While the vehicle in motion, hearing a loud sounds coming from the engine. At first it's sounded like a rock in a tin can, later it was a slapping sound. About 10 minutes later finally got off the highway and turned in to my neighbor hood. At the last right turn, the car seized up. Tried to restart nothing happened. Good thing it was around 11pm there was no traffic or as many cars on the road. If it were it could probably just stop on the middle of the highway. The car is at the dealership and saying it needs a new engine, costing about 13k. Which is absolutely ridiculous, there was no signs of engine problem, engine light wasn't on. Out of no where, engine locked up and I had to push it home.

The contact owns a 2015 Mercedes-Benz C300. The contact stated that while driving approximately 50-60 MPH, the #1 piston cracked. The contact stated that while his daughter was driving, the vehicle was shaking and smoking. The check engine warning light illuminated. The vehicle was towed to an independent mechanic and the contact was informed that the #1 piston was cracked, engine cooler, P0301 cylinder #1, P219 solenoid failure. The vehicle was taken to another independent mechanic and the engine was replaced. The contact called the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, but no further assistance was provided. The failure mileage was approximately 105,102.

A few days ago, I began smelling a strong smell of gasoline when I drove my car. This went on for several days, so I took my car into the dealership. As soon as I described my problem to the service staff and before they checked me in, they asked me if the model was a Mercedes c300. When I replied that it was, they said that they had seen this problem quite often on this model. Given the low mileage of 23,115 miles on my car, a fuel line leak would not normally be expected to occur. Considering that fact along with the reported commonality of this issue, I am concerned that, for other drivers with this potential problem, the symptoms may involve more than just the scent of gasoline and result in car fires or accidents. Neither the dealership nor corporate Mercedes have been respon

Fuel hose system leaking. Inhalation of gas fumes caused headaches and nausea. Risk of vehicle fire. Yes, the problem has been confirmed by a Mercedes dealer. This is a known issue with Mercedes C300 2015 models and other years. There have been other complaints/lawsuits against Mercedes not wanting to pay for the issue. No warnings just strong gas smell.

Fuel system, gasoline. There is a fuel smell coming inside of the car through the front filters. We have changed fuel injector ring however the smell is still there. Mercedes dealer is not willing to do anything about this. I see there are recalls on the same models produced a year prior. Believe this might be the same issue that was not resolved . NHTSA campaign id: 15v138000 ## VIN passed ## Mercedes-benz c300 2015 ##

Gasoline fuel hose leak between the engine and the driver side causing a strong gasoline smell inside the cabin and under the hood when the car is running and causing a fire hazard

High pressure fuel line leaking, strong gas fumes smell in cabin

Constant fuel smell coming from the engine, you can see gas coming out of the high pressure line. When I park in the garage the whole house smells like gas. Even while driving gas smell coming through the vents constantly

Panoramic sunroof spontaneously exploded while the car was sitting. Mercedes claiming something fell into it, but there was nothing above it or in the car while it was sitting in the garage. After reading online, this is happening to a lot of other consumers, including one who has started a class action lawsuit in california

Glass panoramic sun roof lifted off the vehicle at highway speed, I had to grab the front edge of roof,pull off the expressway. Tried to re seat it in the channels but could not close the roof. Drove 120 miles with roof open holding the front edge down, which continued to try to lift off the vehicle. . My vehicle is Mercedes’ 2015 c300. These vehicles have a recall for this very reason but my vin number is not listed. Don’t know why? Need to get my vin listed for this recall. Please help!

The contact owns a 2015 Mercedes-Benz C300. The contact stated while driving 35 MPH, the panoramic sunroof detached from the vehicle without warning. The vehicle was driven to the dealer, and she was informed that the vehicle was not under warranty or recall. The contact was provided an estimate for the repair. The manufacturer was notified of the failure and was provided the same information as the dealer. The vehicle was repaired. The failure mileage was 24,000.

I have the same problem about steering harder when on lower speed, every oil level looks to be perfect.

Tl* the contact owns a 2015 Mercedes benz c250 equipped with continental contact tires, size: 225/45r17 (na). The contact stated that the front driver side tire was beginning to lose air while driving. A compressor was used, but the failure recurred. The contact stated that the tire began to flatten after driving long lengths of time and reduced in size approximately three to five pounds per day. The contact took the tire to the warranty center, the dealer, and the tire manufacturer, but no failures were found with the tire. The DOT number was unknown. The approximate vehicle and tire failure mileage was 14,015.

The contact owns a 2015 Mercedes-Benz C300. The contact stated that a strong fuel odor could be smelled from both inside and outside the vehicle. The vehicle had to be serviced for the failure; however, upon inspection, the contact believed that the source of the odor was from the engine fuel lines. The dealer was notified of the failure and informed him that there were no recalls on the vehicle. The manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 102,000.

While I was travelling on highway, I got an alert about collision system being inoperable, I took my car to the dealership, it was investigated and was told to me that I had an accident? I did not. I am thinking it was some kind of an electrical/radar sensor issue? It did not affect my speed or ability to accelerate