2016 Mercedes-Benz C300 Engine Problems
- Complaints
- 94about this part
- Share
- 32%of 291 total for the year
- Median mileage
- 23,750miles
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 94 complaints about the engine of the 2016 Mercedes-Benz C300, 32% of the 291 complaints for this model year. Where a mileage was given, the median is 23,750 miles. 2 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“2016 MB 300 C, AWD at 87000 miles started giving gas fuel smell when parked in our garage after driving. I took to a local Foreign Car Repair facility and they found a fuel leak at the fuel injector pump. The mechanic changed the Fuel Injector Pump (Bosch) at a total cost of $745.31. Since the change in the pump, the smell has stopped and I feel safe. Who is responsible to reimburse this cost to me?”
NHTSA complaint #11444351, filed 2021-12, 87,000 miles“I bought a new 2016 c-class mercedes benz . I had the car for less than 24 hours when the engine light came on. I immediately took the vehicle in and was told that they do not have a fix for the problem. It is a problem with the ambient airflow. The engine does not work properly, causing a rough ride. When trying to accelerate the engine will stall and then shoot forward.”
NHTSA complaint #10850806, filed 2016-03, 60 miles“My 2016 C300 4matic, which has been serviced exceptionally well, turned 57,000 miles (7k miles outside of warranty), had the check engine light turn on. I went to my mechanic, who has a state of the art diagnostic unit, and it was diagnosed as code p052e which means that the crankcase ventilation regulator valve including the fuel rail needs to be replaced. Mercedes has known about this being a major problem as they modified one of the parts. My dealership quoted me over $ 2100.00 to fix it and deemed it not covered by the extended warranty. …”
NHTSA complaint #11406175, filed 2021-04, 57,000 miles“2016 C300 4matic at about 50k miles, check engine light came on and then as I was driving on the freeway the car just stopped accelerating in the middle of the freeway and had to take my car to the side and towed it to the dealer in west covina. Luckily there was no one on the freeway since it was early sunday morning. Dealer is now saying the car might need engine replacement which will cost me $20k but they want $3000 to do a tear down to make sure. Opened a case with their customer service but they said they can't do anything about it since the car is out of warranty. …”
NHTSA complaint #11388420, filed 2021-01, 52,000 miles“C300 anti collision sensor malfunction light displayed and loss engine power for several seconds. The car was traveling aprox 20 MPH at the time on city street. Then power resumed, the warning light went out. Mercedes-benz of temecula, ca could not find a problem. Workorder 229423, 9/13/16”
NHTSA complaint #10906348, filed 2016-09, 900 milesRelated 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 2016 Mercedes-Benz C300
67 complaintsOther or unknown
65 complaintsElectrical system
32 complaintsBody and structure
28 complaintsVisibility (wipers, defrost, mirrors)
21 complaintsTransmission and drivetrain
18 complaintsSteering
13 complaintsBrakes
9 complaintsAir bags
6 complaintsExterior lighting
4 complaintsForward collision avoidance
3 complaintsSeats
3 complaints
← All problems reported for the 2016 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