2016 Mercedes-Benz GLC 300 fuel system problems

Filed Oct 17, 2025 · Fuel system · 60,814 miles · DE

The contact owns a 2016 Mercedes-Benz GLC300. The contact stated that while receiving routine maintenance, the mechanic noticed a fuel odor coming from the vehicle. The mechanic determined that the fuel injectors had failed and that the fuel rail needed to be replaced. The mechanic provided the contact with information related to the federal safety agency Campaign Number: 21V961000 (Fuel System, Gasoline); for the fuel rails and fuel injectors. The mechanic referred the contact to the dealer for assistance. The dealer was informed of the failure and confirmed that the VIN was not included in the recall. The vehicle was not repaired. The manufacturer was informed of the failure and confirmed that the VIN was not included in the recall. The manufacturer referred the contact to the federal safety agency Hotline to report the failure. The failure mileage was 60,814.

Filed Sep 20, 2025 · Fuel system · CA

Mercedes-Benz USA (MBUSA) To whom It May Concern, Complaint through your dealer, regional MB and state AG. Going through MBUSA is a waste of time. You would be better off going to Sears and buying a shiny new hammer and banging your head every hour on the hour. A little over a year ago, I Purchase a previously owned 2016 GLC300 from a local DGDG dealership in San Jose CA. for the past few month, I started experiencing a heavy fuel odor generated from the fuel rail and fuel injectors. I initiated a leak detection to verify the above-mentioned defect. I became aware the Mercedes Benz has a major issue with the fuel rail and fuel injectors that caused a safety & emission recall campaign 2022030003 that is launched to replace the fuel rail and fuel injectors on 139 Model Year 2016-2020 that included my car GLC-class vehicle. To my surprise my car VIN number was not listed and flagged in this campaign. According to the campaign issue, a leak may develop between the fuel line and the fuel injectors due to trapped debris from the production process, which could affect the safety and emissions of the vehicle. according to the documents of the campaign, trapped debris might damage the seal between the fuel rail and fuel injectors, which over the life of the vehicle, might result in a fuel leak into the engine compartment. I informed Mercedes Bens that my vehicle fuel rail line and fuel injectors have shown to have a safety manufacture failure. Leaking fuel from this area might contact hot parts of the engine and therefore the risk of fire cannot be ruled out. It seems that the fuel pressure deviation has exceeded the thresholds because the fuel odor is perceptible to me. I had an appointment with Mercedes Benz of Stevens Creek, and they established that my vehicle VIN number was not affected by the recall even though the defects exist on my vehicle. I reached out to Mercedes Benz USA, LLC and filed case # [XXX] but they elected not to take responsibility to repair my ca INFORMATION REDACTED PURSUANT TO THE FREEDOM OF I

Filed Oct 23, 2023 · Fuel system · OH

I have noticed extreme gas odors in the cabin of my car, the gas odor is so horrific that even when I exit the car either outside or in my garage the odor remains. My car is housed in my garage and I'm very concerned regarding these fumes which fills up my garage because my home is attached. I researched on a web site that there has been complaints and consequently a recall ( 21V961000) ON 12-12-2021 FOR GLC 300,2016, But my vehicle did not receive a recall notice. I am concerned regarding possible fire or illness related to fumes being inhaled.

Filed Mar 20, 2023 · Fuel system · CT

What component or system failed or malfunctioned, and is it available for inspection upon request? Crank case vent valve malfunctioned 2 years ago and was replaced. Now it is failing again. Reports online from other owners show this part failing about every 2 years / 20k miles. This is not a wear item. Yes it is in my car How was your safety or the safety of others put at risk? It is part of the fuel system so it can potentially damage the car Has the problem been reproduced or confirmed by a dealer or independent service center? Yes Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? It has been inspected by the dealer Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? There is a check engine light that appears right at failure, not before.

Filed Jan 30, 2023 · Brakes, Fuel system · IA

Raw fuel smell when vehicle is at idle. Breaks are very loud at low temperatures. Very squeaky like metal on metal yet the brakes are like new from Mercedes dealership.

Filed Jan 17, 2023 · Fuel system · 15,000 miles · LA

The contact owns a 2016 Mercedes-Benz GLC300. The contact stated while driving at various speeds, there was an abnormal fuel odor inside the vehicle. The dealer was notified of the failure and acknowledged that the failure was a known issue with similar-model vehicles. The contact was informed that the fuel line needed to be replaced; however, the dealer could not schedule an immediate appointment. The manufacturer was notified of the failure. The vehicle was not repaired. The failure mileage was approximately 15,000. The contact stated that the fuel line was replaced under the vehicle's extended warranty.

Filed Dec 29, 2022 · Engine, Fuel system · NY

Check Engine light P052E came on while driving. No collision, normal conditions other than first very cold night of the season. Looked it up and seems to be a common issue with this model.

Filed Nov 6, 2022 · Engine, Fuel system · PA

Crankcase ventilation valve issues

Filed Sep 16, 2022 · Fuel system · WA

The vehicle needs a new PCV Valve / hose, as well as a new turbo charger

Filed Aug 23, 2022 · Engine, Fuel system · NY

While driving on the NYS Thruway last week, when I accelerated to pass another car, my engine bucked and kicked followed by the "check engine" light coming on.In very heavy traffic, I was able to pull to the shoulder. I called my service garage and they suggested I not drive the car for safety reasons. When the tow truck arrived, I briefly started the car with the same bucking and kicking from the engine. The car was taken to my regular garage where the "check engine" codes showed issues with the fuel injector and fuel injection system. I was told there is an existing RECALL CAMPAIGN # 2022030003 for the same year, make and model as mine but, my VIN is not part of that RECALL. I would like your help as I do not believe Mercedes-Benz is being fair or equitable in this RECALL. ThankYou