2017 Mercedes-Benz GLC 300 Fuel system Problems

I smell gas in my car. There is a recall for the fuel parts on the 2019. I have a 2017 with the same issue.

NHTSA ID

11715888

Incident

Feb 5, 2026

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while operating the vehicle, the fuel gauge provided incorrect information and indicated that there was no fuel in the fuel tank. The contact stated that the failure was intermittent and sometimes occurred immediately after refueling. The vehicle was taken to the local dealer who diagnosed the vehicle and determined that the fuel tank needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 55,000. The VIN was not available.

NHTSA ID

11637735

Incident

Jan 22, 2023

Mileage

55,000 mi

Strong gasoline smell coming from the engine bay every morning at start up. I removed protective plastic lining from the under carriage to identify the issue. I identified a lot of gasoline dripping from the top portion of the engine compartment where the High Pressure Fuel Pump is located. There was no warning or check engine lights that alerted of this issue of a gasoline leak. This is very dangerous as it could cause the vehicle to catch fire.

NHTSA ID

11631359

Incident

Dec 18, 2024

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that she detected an abnormally strong fuel odor after parking the vehicle, and while starting the vehicle. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 70,000.

NHTSA ID

11590367

Incident

Mar 1, 2024

Mileage

70,000 mi

Smell of gas

NHTSA ID

11565695

Incident

Jan 12, 2024

After noticing my engine light come on, I had my vehicle checked out, the dealer informed (after spending $250.00) that the problem is the crankcase ventilation and it's a common problem. It seems the oh so familiar crankcase ventilation system is not working. This is a common problem with the GLC300 and Mercedes Benz needs to correct it. The engine is not being ventilated properly and the overwhelming smell of gasoline engulfs the interior of the vehicle. This is putting mine and the life of my family at risk, due to a faulty manufacturer issue. Mecedes Benz needs to obviously correct the faulty parts they use as soon as possible, before someone loses their life.

NHTSA ID

11563324

Incident

Aug 21, 2023

The Positive Crankcase Ventillation harness fails and check engine light goes on. Through my research I found that many C class and GLC class with same engine have had similar issues and there was a recall and covered. My particular VIN was not included in the recall but had this check engine warning sign before 50K miles warranty expires. The light always went away but now it has come back on for the third time and not going away. The cost to replace this simple module is mostly labor at 8 hours is around $2,000. I believe this is an emission component and need to be covered under state and federal emission standards warranty. The initial recall with this issue should be involved with same engine and cover all cars and SUV's with same engine. I do believe this is an Emission control device that is regulated by state and federal standards and should be covered under warranty.

NHTSA ID

11539238

Incident

Feb 25, 2023

CRANKCASE VENT VALVE PCV ENGINE LIGHT ON AIR POLLUTION DANGER STALLING DANGER

NHTSA ID

11520804

Incident

Jan 7, 2023

Odometer reading more miles then driven (may have been tampered with altered) There is an electrical issue The computer required to be reprogrammed has not been done yet While driving the vehicle completely stop accelerating in the middle of traffic on the interstate placed my life in danger especially because traffic was moving rapidly the vehicle was jerking horribly also several codes came on when the service light came on also needed a pcp vale hose system they never repaired it i asked to have it repaired they agreed and then stated the vehicle had to many issues was sending to auction but yet reselling the vehicle still have not repaired completely this could be dangerous

NHTSA ID

11520184

Incident

Mar 2, 2023

Defective crackcase vent valve

NHTSA ID

11488464

Incident

Sep 7, 2022

The fuel line leaks directly under the driver seat. Filling the cabin with fuel vapors. Mercedes has an extended warranty for this problem but only on vehicles from 2004 to 2009.

NHTSA ID

11454122

Incident

Feb 25, 2022

P052E code, Positive Crankcase Ventilation Regulator Valve failed. It is a known issue by Mercedes Benz on its 2016 and newer C-Class and GLC class vehicles. The valve is clearly a manufacturer defect that is burdensome to the consumer as the part is located near the engine mount and prohibitively expensive to fix due to per hour labor rates. Hundreds if not thousands of consumers have been affected through no fault of their own.

NHTSA ID

11453287

Incident

Dec 1, 2021

WHILE DRIVING, THE MALFUNCTION INDICATOR LAMP (MIL/CHECK ENGINE LIGHT) CAME ON. AFTER SOME DIGGING THIS WAS CAUSED BY AN OBD II CODE OF P052E, WHICH INDICATES A BLOCKED CRANKCASE VENT VALVE ACTUATOR. THIS APPEARS TO BE A MANUFACTURING DEFECT IN THESE VEHICLES.

NHTSA ID

11414728

Incident

Apr 9, 2021

Mileage

46,000 mi

SMELLS LIKE GAS COMING THROUGH THE VENTS INTO THE CABIN OF THE VEHICLE AND CAUSES HEADACHES

NHTSA ID

11414232

Incident

Mar 23, 2021

Mileage

35,300 mi

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 ID

11397811

Incident

Feb 17, 2021

Mileage

60,000 mi