2017 Mercedes-Benz C300 Engine Problems
- Complaints
- 77about this part
- Share
- 36%of 216 total for the year
- Median mileage
- 36,000miles
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 77 complaints about the engine of the 2017 Mercedes-Benz C300, 36% of the 216 complaints for this model year. Where a mileage was given, the median is 36,000 miles. 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“2017 mercedes C300 coupe 49,000 miles. This car has been to the service center 10 times for engine problems vibratiing, jerking, shaking and ticking last visit at hoehn mercedes,. Service tech said that these engines automatically vibrate and jerk and that is just the nature of the beast?? Wtheck???!! Have already had piston 1 crack and break, mechanic never found the broken piece. Car is much worse since that repair. Hoehnn mb told me that they were replacing the engibe but whwn I picked up the van they said they decided just to replace piston #1”
NHTSA complaint #11342812, filed 2020-08, 48,000 miles“When the car is in the a feature, where it turns on and off when not in motion, it gets stuck in that mode as if a magnet is holding it in that position. It will not move, it stalls. I turn it off and turn it back on and sometimes it still will not move, sometimes, it will not turn back on. This has happened on several different occasions. Once, I pulled to the side of my mailbox to pick up mail, and another occasion I pulled into my garage, and it stopped, and would not turn on. This is very dangerous, I would hate to be in traffic, railway crossing, ir stop sign and this occurred. …”
NHTSA complaint #11402743, filed 2021-03, 36,000 miles“Car started to vibrate at idle then graduated to shaking at all times even during acceleration. Acceleration very slow, stuck feeling. Brought to mercedes at 28k miles. They stated it is a cracked piston in cylinder 1. This is apparently a very common issue with this engine but there are no recalls yet.”
NHTSA complaint #11343507, filed 2020-08, 28,000 miles“Piston 1 cracked at 48,000 miles. Mb told owner that the engine had to be replaced but when finding out that the warranty was up at 50,000 they replaced the piston instead. Car is still shaking at idle and rough ride. Engine shakes and jerks.”
NHTSA complaint #11337524, filed 2020-07, 48,000 miles“this is my send time writing in. mercedes used the wrong wrist pins for the pistons leading to my wife getting a cracked piston on freeway in phx.if you look up cylinder 1 issues on this model there is a lot of people who have encountered this. why this hasn't been recalled and sticking consumers with a10k plus repair is beyond me. if you use the wrong parts you should be responsible for the repair!!!”
NHTSA complaint #11643047, filed 2025-02Related service bulletins
- 11034064Jun 19, 2026Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline…
- 11018530May 15, 2025Complaint Check engine light illuminated Fault code stored in N3/10 control unit- P052E71 – Positive Crankcase Ventilation Regulator Valve Performance: The valve for crankcase…
- 11008712Oct 4, 2024Complaint Check engine light on. One of the below fault codes is current in the engine control module (N3/10). P04DB29, P04DB31, P04DB79 Cause Open circuit or high resistance to…
- 11031806Aug 9, 2024In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA (“MBUSA”) is extending…
- 11008064Aug 9, 2024In our continuing efforts to ensure the proper performance and quality of your vehicle, we are writing to inform you that on certain Model Year 2011-2018 C-Class, E-Class…
- 11031589Jul 9, 2024This NCU replaces the prior NCUs issued on August 25, 2023, August 31, 2023 respectively and, contains clarification on parts ordering.
- 11005276Jul 8, 2024Complaint Check engine light illuminated Fault code stored in N3/10 control unit- P052E71 – Positive Crankcase Ventilation Regulator Valve Performance: The valve for crankcase…
- 11000623May 14, 2024Complaint Check engine light illuminated Fault code stored in N3/10 control unit- P052E71 – Positive Crankcase Ventilation Regulator Valve Performance: The valve for crankcase…
- 11031729Mar 20, 2019The purpose of this letter is to advise you of additional benefits that Mercedes-Benz is providing to you regarding your vehicle ownership.
- 11031616Mar 13, 2019Daimler AG (“DAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on the various Model Year (“MY”) 2014 - 2018 Mercedes-Benz vehicles listed below, the engine…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2024 | 2 | 18% |
| 2023 | 2 | 9% |
| 2022 | 2 | 8% |
| 2021 | 8 | 57% |
| 2020 | 8 | 24% |
| 2019 | 17 | 25% |
| 2018 | 34 | 34% |
| 2017 | 77 | 36% |
| 2016 | 94 | 32% |
| 2015 | 127 | 33% |
| 2014 | 2 | 2% |
| 2013 | 8 | 3% |
| 2012 | 5 | 2% |
| 2011 | 10 | 2% |
| 2010 | 13 | 3% |
| 2009 | 16 | 3% |
| 2008 | 31 | 5% |
Other parts of the 2017 Mercedes-Benz C300
36 complaintsFuel system
33 complaintsElectrical system
31 complaintsBody and structure
24 complaintsSeat belts
21 complaintsAir bags
15 complaintsSteering
13 complaintsTransmission and drivetrain
12 complaintsVisibility (wipers, defrost, mirrors)
9 complaintsForward collision avoidance
3 complaintsBrakes
2 complaintsEngine cooling
2 complaints
← All problems reported for the 2017 Mercedes-Benz C300
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology