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Engine coolingPart report

2016 Mercedes-Benz GLC 300 Engine cooling Problems

Complaints
4about this part
Share
3%of 133 total for the year
Median mileage
50,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the engine cooling of the 2016 Mercedes-Benz GLC 300, 3% of the 133 complaints for this model year. Where a mileage was given, the median is 50,000 miles.

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 contact owns a 2016 Mercedes-Benz GLC300. The contact stated that while operating the vehicle, the check engine warning light remained illuminated. The vehicle was taken to the local mechanic who diagnosed that the crank case ventilation sensor was faulty and needed to be replaced. The vehicle was not repaired. The local dealer was not contacted. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was 70,000.”

NHTSA complaint #11606449, filed 2024-08, 70,000 miles

“The contact owns a 2016 Mercedes-Benz GLC300. The contact stated that the check engine warning light was illuminated. The vehicle was taken to dealer, where it was diagnosed that the crankcase ventilation system needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was taken back to the dealer, where the diagnostic result was confirmed. The vehicle was not repaired. The manufacturer was notified of the failure, and a case was opened. The failure mileage was approximately 30,000. The VIN was unavailable.”

NHTSA complaint #11520208, filed 2023-05, 30,000 miles

“The contact owns a 2016 Mercedes-Benz GLC300. The contact stated while driving at an undisclosed speed, the check engine warning illuminated. The contact stated that the vehicle was taken to the Emissions Center, and the vehicle failed the Emissions test. The vehicle was taken to the dealer to be diagnosed. The dealer retrieved DTC: P052E (PCM has detected an inappropriate degree of pressure from the crankcase pressure sensor). The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was unknown.”

NHTSA complaint #11635618, filed 2025-01

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
202212%
201711%
201643%

Other parts of the 2016 Mercedes-Benz GLC 300

Engine
38 complaintsBrakes
27 complaintsFuel system
21 complaintsOther or unknown
21 complaintsAir bags
12 complaintsElectrical system
11 complaintsSteering
7 complaintsTransmission and drivetrain
6 complaintsSeat belts
5 complaintsVisibility (wipers, defrost, mirrors)
5 complaintsBody and structure
4 complaintsWheels
4 complaints

← All problems reported for the 2016 Mercedes-Benz GLC 300

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