2014 Mercedes-Benz C300 Engine Problems
- Complaints
- 2about this part
- Share
- 2%of 94 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine of the 2014 Mercedes-Benz C300, 2% of the 94 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The intake manifold blew on my car while it was off overnight and I took it to the Mercedes dealership to have it fix and the next day I got it back after it was repaired the same problem happened again when I went to unlock my car I heard a bang and smoke coming from the engine”
NHTSA complaint #11575862, filed 2024-03“Parked the car, did something, came back and car did not start. Key in, no crank, no start, no steering. No lights on the dash, no gear shifting, can’t roll the windows up. All out of nowhere. Think it’s a problem with the Electronic Steering Lock.”
NHTSA complaint #11466656, filed 2022-05Related service bulletins
- 11017039Apr 1, 2025Complaint Vehicle with atypical reduced heat output. Cause Silicate granulate may have escaped from a damaged bag in the expansion reservoir (not visible), reducing the coolant…
- 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…
- 10160738Apr 11, 2019Update engine electronics (ME-SFI) control unit software
- 10158329Oct 9, 2017Oil in engine wiring harness
- 10058561Jul 27, 2015Xentry (mercedes): vehicle shuts down at 5 mph but engine able to be restarted via eco start stop due to mismatched levels of software. Model 2014-15 217, 222.
- 10058545Jul 1, 2015Xentry (daimler): due to unfavorable tolerance of piston wrist pin, resulting in knocking, clattering/rattling noises, causing an enlarge end float connecting rod in piston, from…
- 10058548Jun 4, 2015Xentry (daimler): stored in engine control unit are faults relating to throttle valve actuator and/or oxygen sensor due to occasional transition resistance at contacts, causing…
- 10059775Aug 11, 2014Summary to be provided on a future date.
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 2014 Mercedes-Benz C300
52 complaintsSteering
13 complaintsSuspension
11 complaintsElectrical system
9 complaintsBody and structure
9 complaintsOther or unknown
8 complaintsVehicle speed control
3 complaintsBrakes
2 complaintsSeats
2 complaintsWheels
2 complaintsFuel system
1 complaintsLatches, locks and linkages
1 complaints
← All problems reported for the 2014 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