Mercedes-Benz / GLC 300 / 2018
2018 Mercedes-Benz GLC 300 problems
Owners have filed 124 complaints about the 2018 Mercedes-Benz GLC 300 with NHTSA. Engine accounts for 22.6% of them — the clear leader, ahead of electrical system at 10.5%. A further 16.1% were filed without a specific system named.
Complaints124
Crashes8
Fires3
Injuries4
Deaths0
What owners report breaking
Engine 22.6% · 28
Unknown or other 16.1% · 20
Electrical system 10.5% · 13
Structure 8.1% · 10
Power train 6.5% · 8
Seat belts 6.5% · 8
Fuel/propulsion system 5.6% · 7
Air bags 4.8% · 6
Severity
Of those complaints, 8 describe a crash, 3 describe a fire and 4 report an injury.
Reading the numbers
Filing volume has held steady, 41 in the last three years against 48 in the three before.
The median odometer reading at the time of complaint was 9,600 miles.
In owners' own words
Car failed to accelerate due to faulty fuel pump, fuel tank, etc. Car stopped and died several times in the middle of heavy traffic. Mercedes Benz of West Houston, Sewell Dealership, has my car that was towed to them late afternoon on 3/5/2024. I have owned a Mercedes for over 40 years and never had this occur or be scared due to the carâs lack of performance. Engine
Error code P052E71 on a 2018 Mercedes-Benz GLC 300 4MATIC means the Positive Crankcase Ventilation (PCV) Regulator Valve Performance has a malfunction, specifically that the partial-load ventilation valve actuator is blocked. By research, i found that this is a very common problem on those engines, and no recalls from the company to fix their fault. Engine
I was driving when engine light came on.It then went into limp mode.The car would not accelerate we me trying to cross a busy 60mph road.I was almost killed.The code after it was tested p2138 .Pedal position sensor.This fault almost killed me.... Engine
Verbatim from NHTSA filings. Complaints are unverified owner reports.
Safety recalls
Checking NHTSA for open recalls…