2018 Mercedes-Benz C 300 4MATIC Engine Problems
- Complaints
- 2about this part
- Share
- 17%of 12 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 2018 Mercedes-Benz C 300 4MATIC, 17% of the 12 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.
“2018 Mercedes C300. P052E check engine code. Positive Crankcase Ventilation failed with less than 28K miles. Common reported problem but not covered after warranty period, even with extended warranty addition. It's a major part of the engine function and 6 hours of labor to replace. Mercedes Benz should cover this type of fault on the design.”
NHTSA complaint #11503416, filed 2023-01“Very common problem on all Mercedes - code P052E - second time on this car. Engine light, 2nd time on this car. Car is 2018 and has 45k miles. First time it was at 28037 miles. This is a MAJOR issue costing consumers $1500-$2500 to repair and needs a recall from manufacturer”
NHTSA complaint #11584844, filed 2024-04Related 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…
- 11030302Mar 27, 2026Complaint -Check engine light illuminated. -Engine runs rough. -Poor shifting or jerking when accelerating. -Fault codes stored related to mixture formation, injector quantity…
- 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…
- 11008056Sep 16, 2024Complaint Check engine light on. Fault code P207273 - "Throttle actuator valve is blocked due to ice" stored. Engine may crank and not start. Fault code P210185 may also be…
- 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.
- 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 |
|---|---|---|
| 2018 | 2 | 17% |
Other parts of the 2018 Mercedes-Benz C 300 4MATIC
4 complaintsBody and structure
4 complaintsAir bags
1 complaintsElectrical system
1 complaintsSeat belts
1 complaintsSteering
1 complaintsSuspension
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 2018 Mercedes-Benz C 300 4MATIC
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 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