There is a major issue with the 2015 m274 mercedes engine regarding the wrist pins. Mercedes has issued numerous internal service bulletins about the issue. The engines were manufactured with wrist pins with too much tolerance that slap against the piston when operating that could lead to premature engine failures. There are hundreds of complaints on online forums of premature engine failures (pre 100k miles). I contacted mercedes and they refuse to do anything to fix this problem the repair is well over $8,000 and the average person just can not afford it. You diagnose the problem based on chatter during deceleration. Please make mercedes make this right and fix the affected cars the right way. I just bought this car and I am now in the hole over $20,000
2015 Mercedes-Benz C300 engine complaints
Page 5 of 5: complaints 101 to 128 of 128, newest first, as owners wrote them.
Every time I start my car it smells like gas and it's so strong to the point where it gives me headaches. Also I was on the freeway and the roads were wet from previous rain and I almost died and hydroplaned on the freeway. Even if it's a small bit of rain my car starts shaking as if I don't have control. I do not feel safe in this car and I just got the car a month ago.
Tl* the contact owns a 2015 mercedes-benz c300. The contact stated that while attempting to accelerate from a stop light, a loud sound came from the engine compartment and the vehicle began to vibrate and shake before stalling. The vehicle was towed to the local dealer keeler mercedes benz located at 1111 troy schenectady rd, latham, ny 12110 who diagnosed that the engine was faulty and needed to be replaced. The cause of the engine failure was not provided. The manufacturer was notified of the failure. The failure mileage was 48,000. ## VIN passed ## mercedes-benz 2015 c300 amg ##
While driving on the highway my my mercedes benz c300 2015 with 37000 miles ,engine broke, and you are not expecting that when you are driving at 65 MPH. The mechanic is saying it is a wrist pin and a cracked #1 piston and it is a very common issue on that car and mercedes refuses to recall or fix the problem im going to leave a link with one of the many webpages with al lot of people complaining about that problem. Thank you. Https://mbworld.org/forums/c-class-w205/731642-w205-c300-stay-away-piston-cracked-65-k-miles.html
Piston cracked at 68,000 miles, causing engine damage that cannot be repaired.
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.
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.
Tl* the contact owns a 2015 mercedes-benz c300. While the contact's daughter was driving at an unknown speed, the vehicle failed to accelerate and began to hesitate. In addition, the check engine warning indicator illuminated. The driver was able to park on the side of the road. The vehicle was towed to mercedes-benz of stevens creek (located at 4500 stevens creek blvd, san jose, ca 95129, (408) 641-4610) where it was diagnosed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not notified. The failure mileage was 58,000.
Engine broke a piston at 53,000 miles in normal use. Causing major rupture on engine.
Tl* the contact owns a 2015 mercedes-benz c300. While driving 60 MPH, the turbo engine seized. There were no warning indicators illuminated. The vehicle was taken to open road mercedes-benz (1250 us-22, bridgewater, nj 08807, 908‑685‑0800) where it was diagnosed that the turbo failed. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 45,000. The VIN was not available.
Dont know which category it falls. I bought this car in august 2015. In one week it would not start even. Towed to dealership and they said, the grounding screw was loose. I am so surprised that a car comes out from factory with a loose grounding issue. In the last 2 weeks, the car just stalled at the signal. All lights came up. I had the eco start/stop mode on. This happened 3 times and finally I shut the eco start/stop mode down. It is so dangerous that in heavy traffic, when people are ready to drive on change of signal, the car wont move, people are honking and frustrated and I am too. Looked online and so many people are complaining the same. The whole of dashboard lights up like when a car stalls. This is very dangerous. Anybody waiting behind you can take the pedal from the brake and smash into you. Similarly, for last 2 months, I have noticed that there is a jumping nature when you take leg of the brake at the signal. That scares me as well. From the feel of it, I feel this is primarily a software issue where the computer thinks it is in some mode when it is not or something and shuts everything down as a precautionary measure or something
Tl* the contact owns a 2015 mercedes-benz c300. While driving 50 MPH, an unidentified warning indicator illuminated and stated that the vehicle was overheating and needed to be turned off. The contact pulled the vehicle to the right side of the road and turned off the vehicle. After ten minutes, the contact restarted the vehicle and drove away. Calstar motors in glendale, california was made aware of the failure and requested that the vehicle be brought in for service. The manufacturer was made aware of the issue. The failure mileage was approximately 20,000. The VIN was not available.
Tl* the contact owns a 2015 mercedes-benz c300. The contact received notification of the federal safety agency campaign number: 17v114000 (electrical system, engine and engine cooling). The part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. A dealer was not contacted about the recall. The manufacturer was not made aware of the issue. The contact experienced the failure of the vehicle overheating in december of 2016. Helms brothers mercedes-benz in bayside, new york was made aware of the failure. The vehicle was not repaired. The manufacturer was not made aware of the issue. The failure mileage was 20,000. Parts distribution disconnect.
Tl* the contact owns a 2015 mercedes-benz c300w4. After starting the vehicle, the odor of mold entered the cabin of the vehicle through the HVAC system. Mercedes-benz of mobile in mobile, alabama replaced the air filters and cleaned the cooling system within the HVAC twice, but the failure recurred. The manufacturer was not made aware of the issue. The failure mileage was approximately 15,000.
Tl* the contact owns a 2015 mercedes-benz c300w4. The contact received notification of the federal safety agency campaign number: 17v114000 (electrical system, engine and engine cooling). The part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. Mercedes-benz of mobile in mobile, alabama was made aware of the recall and stated that the parts were unavailable and were not available anywhere in the USA. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect. Updated 11/01/17*lj updated 11/02/2017
Tl* the contact owns a 2015 mercedes-benz c300. The contact received notification of the federal safety agency campaign number: 17v114000 (electrical system, engine and engine cooling); however, the parts to do the repairs were unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The dealer was not contacted. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Vin tool confirms parts not available.
Tl* the contact owns a 2015 mercedes-benz c300. The contact received notification of the federal safety agency campaign number: 17v114000 (electrical system, engine and engine cooling); however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. Mercedes benz of morristown, new jersey was made aware of the recall and stated that the parts were unavailable. The manufacturer was made aware of the issue. The contact had not experienced a failure. Vin tool confirms parts not available.
Tl* the contact owns a 2015 mercedes-benz c300. The contact received notification of the federal safety agency campaign number: 17v114000 (electrical system, engine and engine cooling); however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The dealer (buckhead mercedes in atlanta, georgia) confirmed that the part was not available for the recall remedy. The manufacturer did not know when the parts would arrive. The contact had not experienced a failure. Vin tool confirms parts not available. Updated 07/18/17*lj updated 08/22/2017
The federal safety agency recall #17v114 starting current limiter our mbenz c300-2015 model has been recalled and needs to be repaired. Its more than 60 days since the issue is known but the repairs are still not available. This thing can be dangerous to our life and needs to be fixed asap
Tl* the contact owns a 2015 mercedes-benz c300. The contact received notification of the federal safety agency campaign number: 17v114000 (engine and engine cooling). The part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was not notified of the issue the contact had not experienced a failure. Vin tool confirms parts not available. Updated 06/29/17*lj
While I was driving on the highway & local roads, the car suddenly became unresponsive and started showing messages that all systems are inoperative. Pre safe functions limited,and inoperative traction control light comes on along with the blindspot not activated, esp system was off as well. The car started slowing down and had to be pulled over to turn off and on. This has happened 3-4 times and on busy roads, car is sent to the shop and only has 27000 miles. I am scared to drive as I could die in a car accident because of this [xxx] car. Mercedes need to recall this asap, if they are not then we should open a class action lawsuit against them as they are playing with our lives. Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).
New vehicle purchase 07/11/15, has been in/out mercedes shop since the date of purchase due to electrical problems where car was flooded by rain when purchased due to a plug was not placed in the car by the manufacturer. Requesting a replacement due to electrical problems multiple times with being stranded. Vehicle would die and not crank with having to pull over to the side of the road multiple times due to vehicle malfunctioning. Vehicle was recently towed due to entire system went out and was stranded with vehicle not cranking when parked and died completely. Vehicle electrical system was recently found to be corroded and was changed out multiple times. Vehicle is currently running like a truck since this last repair. This vehicle is a lemon and should be replaced due to the lemon law and the vehicle was flooded by rain due to missing plug from manufacturer day one of purchase. Just received the car back 10/26/16 after two weeks, with the vehicle being in for dying and malfunction due to electrical problems. I'm afraid to drive this vehicle for a distance due to the electrical problems and in fear of being stranded again, with mercedes having no guarantee for my safety. Vehicle VIN# at mercedes shows all the problems with this vehicle being in/out of the shop for electrical problems and malfunction as well as changed out electrical system twice. Vehicle problems started september 2015. This vehicle is considered a lemon and I should be given a replacement due to this vehicle being flooded from the rain and having ongoing electrical problems. This vehicle has hindered me from traveling and has caused me frustration due to all the problems. This vehicle should never be allowed on the road again due to flooding and electrical problems and can cause a death. Mercedes is being negligent, with trying to repair and not salvaging as the lemon law requires.
While driving "collision prevention assist plus inoperative" message appears on dashboard. Car loses its ability to accelerate. Occurred twice (january 2015) on city streets forcing me to pull over to the side of the road and restart my car, the error disappears and I am able to drive normally. 4/7/16 occurred while traveling 65mph on an interstate. I lost ability to accelerate and was almost rear-ended by a semi-truck. The vehicle was serviced at a mercedes dealership on 1/11/16 the highway incident occurred after the "fix". It is currently back at the dealership being tested by the service department. I am told the current fix is to replace all the senors. I have opened a case with mbusa to repurchase the vehicle given the initial repair did not work and put me in perilous highway situation. I purchased the vehicle in october of 2015.
Tl* the contact owns a 2015 mercedes-benz c300. While driving at various speeds, the vehicle would independently decelerate with the RPM gauge reading between 4,000-5,000. The failure occurred intermittently. When the vehicle was shut off and restarted, the vehicle returned to normal. The vehicle was taken to the dealer for diagnostic testing; however, the failure could not be duplicated. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 1,000.
Two issues, purchased a certified pre owned vehicle. At 8900 miles, we noticed the car was idling very rough on a cold start, almost the sound of a diesel. The sound would resolve after 10 minutes of driving. Service informed us that there was a recall on the rods and pistons. We had the engine rebuilt, and the noise is the same, if not worse. The car sounds nothing like laterbuild '15 models or '16 models, nor does it run as smoothly. Secondly, 5 occurrences involved inoperative collision prevention assist warnings and inoperative anti-skid warnings appearing on the dash causing the car to reduce operating speed to 20mph max. Car needed to be shut off and restarted after a 5 minute period each time these warnings appeared, in order to drive over 20mph. The vehicle was serviced for these warnings twice. The first service diagnosed the car with a coding issue. The second, involved replacing modules. This all occurred during the two months of owning the car. We notices several similar complaints regarding the early build 2015 c300s, and decided to cut our losses and purchase another vehicle. We did not feel safe in that car.
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.
1. Warning light "inoperative collision prevention assist plus" comes up on the display on & off when driving. Car was sent to service on 4/22 but didn't duplicate the issue. Car was returned to me on 4/23. 2. On 4/24, warning light "inoperative collision prevention assist plus" comes up again plus the yellow "engine light".
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