2017 Mercedes-Benz GLC 300 Engine Problems
- Complaints
- 37about this part
- Share
- 37%of 101 total for the year
- Median mileage
- 60,000miles
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 37 complaints about the engine of the 2017 Mercedes-Benz GLC 300, 37% of the 101 complaints for this model year. Where a mileage was given, the median is 60,000 miles. 1 of these say a crash was involved and 2 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The engine suddenly went up in flames while driving,my wife switched off the ignition and go out of the car. There was a big hole and mercedes authorized dealer siad this is a catastrophic event. This car is new purchased on october 31st 2016 mb says they will replace the engine as it is in warranty, but sentimentally we are so upset , if the fire would have caught on to gas tank. Please suggest. Vehicle was in motion and she was driving at less than 30 miles per hour when she noticed burning smell and immeditely fumes were coming from the AC vents. Please suggest our options in this case”
NHTSA complaint #10981207, filed 2017-04, 3,000 miles“1. Crankcase ventilation valve performance failed check engine light is on while driving 2. Smells gas from under the hood. Heard it's common problems”
NHTSA complaint #11397811, filed 2021-02, 60,000 miles“对不起我说中文， 我的英语不好 我这辆车有安全辅组问题 有一次突然发动机熄火然后静止了几秒 然后我又从新启动，还有发动机有噪音，我已经拿去4s店维修了4次…”
NHTSA complaint #11112071, filed 2018-07, 6,500 miles“My car has P052E code with a message of Positive Crankcase Ventilation Regulator Valve Performance. My car mileage is only 13,700 as of today. I think this is a cause of a deflective part and this should be a recall item. FYI, Wen I contact a Mercedes dealership and they asked me a cost of $2,500 to fix this issue. Thank you,”
NHTSA complaint #11491514, filed 2022-10“I was driving and my engine light came on. I ran the code and it came up as P052E which has to do with the positive crankcase ventilation regulator valve. I’ve heard that this part goes out very often on the Mercedes Benz.”
NHTSA complaint #11651403, filed 2025-03Related 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.
- 10202522Jun 4, 2021Vehicle does not start after charging process
- 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 |
|---|---|---|
| 2025 | 3 | 19% |
| 2024 | 7 | 33% |
| 2023 | 15 | 27% |
| 2022 | 10 | 16% |
| 2021 | 30 | 45% |
| 2020 | 21 | 30% |
| 2019 | 11 | 23% |
| 2018 | 28 | 32% |
| 2017 | 37 | 37% |
| 2016 | 38 | 29% |
Other parts of the 2017 Mercedes-Benz GLC 300
16 complaintsElectrical system
15 complaintsOther or unknown
13 complaintsAir bags
11 complaintsSeat belts
8 complaintsVisibility (wipers, defrost, mirrors)
8 complaintsTransmission and drivetrain
7 complaintsBrakes
4 complaintsForward collision avoidance
4 complaintsSteering
4 complaintsTires
3 complaintsSeats
2 complaints
← All problems reported for the 2017 Mercedes-Benz GLC 300
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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