What 315 owners told NHTSA about the 2016 Mercedes-benz C-class Hybrid

Vent valve failed and needs repair. I could smell gasoline from my car weeks up to the check engine light going off. These leaking fumes are a hazard to the population and environment. This problem is quite common on Mercedes forums such as MBWorld. This car was diagnosed at an official Mercedes Benz dealership (New London, CT). The check engine light came on weeks after symptoms started to appear (on and off).

NHTSA ODI 11526231

This auto has approximately 45,000 miles on it and was found to have a fuel leakage issue on a high pressure pump and a fuel hose. Gas smell was very bad and upon inspection, gas was leaking at the hose / pump connection directly onto the engine. I had the defect repaired for a total of $1288.57 and tried to submit the claim to Mercedes. I found out that this issue has been a problem for Mercedes and they have published an extended warranty rather than issue a recall. Mercedes has now declined the complaint and because this seems to be a major issue I wanted to press this with your agency. Please let me know if you would like any additional documentation regarding this matter. Thank you - [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA ODI 11526045

Check engine light P052E, PVC valve. Dealer wants $2,500 for this repair and people are complaining that around 30k-50k it does it. Thats ridiculous. My dealer said its a common issue but Mercedes is not issuing a recall.

NHTSA ODI 11524763

Fuel smell in cab of car. Strong smell. Took it to dealer and they said they were damp with fuel

NHTSA ODI 11523852

My car failed smog test due to code P052e positive crankcase ventilation regularly valve. Upon some research, I found that this is very common issue with this car. The repair costs +$2000 before tax at the dealership. Please consider this complain as this issue is very common with this make model and unfortunately many drivers don’t realize that it’s due to faulty system.

NHTSA ODI 11520243

When i would turn the car to warm up, it has a hefty gasoline smell. Ive seen a lot of people online talk about the same issue. It seems there is a leak somewhere and it is definitely not safe. Especially when i turn on the heat, it just blows the gasoline into my face. This cant be safe and should definitely be fixed

NHTSA ODI 11509155

Check engine light appeared this morning, had the code scanned and found it to be P052E. This code is in reference to the Positive Crankcase Ventilation valve, which is responsible for routing excessive crankcase gases. After extensive research online, it would seem this is a known issue for Mercedes once they reach 50,000 miles, right outside of warranty. This is a very costly fix due to it being labor intensive. This should be a recall as it is a known mechanical issue, and even the dealers echo the same.

NHTSA ODI 11507685

A fuel smell can be detected at idle inside the vehicle and around the engine area. A recall for some VIN's of this model in this year was enacted but not this particular model. No visible fuel moisture can be detected. A repair facility stated it might be a faulty clamp on the return fuel line. The recall was for dirt on manufacturing between the fuel injectors/fuel rail. This is a safety / emissions problem that hopefully does not lead into a fire. No warning lights are present. This started about 2 months ago

NHTSA ODI 11506631

Strong smell of gasoline on a daily basis for 3 months. Took vehicle to mechanic's and was informed that the fuel lines were leaking. Was shown the cracked lines.

NHTSA ODI 11504955

MY VEHICLE (2016 C-CLASS 300) HAS A STRONG GAS SMELL WHEN THE VEHICLE IS COLD AND IDLING. SEEMS LIKE IT'S COMMON PROBLEM IN W205 C300 CARS. TAKING TO THE DEALERSHIP FOR DIAGNOSTICS THERE IS A CLASS ACTION INVESTIGATION: HTTPS://WWW.SAUDERSCHELKOPF.COM/INVESTIGATIONS/AUTOMOTI VE/MERCEDES-C300-AND-GLA250- FUEL -SMELL-CLASS-ACTIONINVESTIGATION/ YOU CAN SEE MULTIPLE PEOPLE COMPLAINING ABOUT THE SAME FUEL LINES;

NHTSA ODI 11501900

The contact owns a 2016 Mercedes-Benz C300. The contact stated he noticed an abnormal fume odor entering through the air vents of the vehicle. The contact self-diagnosed the vehicle as having a fuel leak from the fuel pump. 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 83,000.

NHTSA ODI 11500300

2016 MERCEDES BENZ C300. When I start the car , you smell gas inside and outside of the car. Also the fumes come the vent when the heat is turned on. I have approximately 69,700 miles on my car

NHTSA ODI 11498933

There is a strong fuel smells in the interior of my vehicle during a cold start of the vehicle, this is a 2016 Mercedes Benz C300, i called the Mercedes Benz customer service at 800-367-6372 and i was told my vehicle didn't qualify for a free repair. Thank you. Manuel

NHTSA ODI 11498260

Car smells like gasoline especially when the s/c or heater is in use.

NHTSA ODI 11498166

The contact called on behalf of her daughter who owned a 2016 Mercedes-Benz C300. The contact stated the vehicle had an abnormally strong fuel odor coming from the inside and outside of the vehicle. There were no warning lights illuminated. The contact had not taken the vehicle to the dealer. The vehicle had not been diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 72,000.

NHTSA ODI 11495110

Car cabin continuously smells like gas after several repairs to the AC. AC was repaired because of mold issue a few months back, however, issues with the AC is always a problem with this car and model.

NHTSA ODI 11494520

The contact owns a 2016 Mercedes-Benz C300. The contact stated after starting the vehicle with the heater running, there was an abnormally strong gasoline odor coming from the vehicle. The vehicle was not diagnosed nor repaired. The manufacturer was not contacted or informed of the failure. The failure mileage was 90,000.

NHTSA ODI 11494456

Horrible fuel smell coming through Air conditioning vents on cold start up. This presents a safety hazard as there is an obvious fuel leak on a still late model vehicle with no safety recall in sight.

NHTSA ODI 11490742

The contact owns a 2016 Mercedes-Benz C300. The contact stated while driving 45-60 MPH, the vehicle began to stall. The contact depressed the accelerator pedal several times but the vehicle failed to respond. The vehicle stalled. The contact was able to veer to the side of the road. The contact was able to restart the vehicle. The check engine warning light and several unknown warning lights were illuminated. The vehicle was towed to the contact’s residence. The vehicle was then towed to the local dealer where it was diagnosed that the fuel pump and fuel tank needed to be replaced. The vehicle was being repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 61,000.

NHTSA ODI 11478130

I was moving my car from one parking space to another space in front of my house. As I was pulling into the new space, I stopped to check the position of my car. As I lifted my foot off the brake, the car unexpectedly started to lurch forward. When I released the brake pedal, the car suddenly accelerated and proceeded to jump the curb and run into the front of my house. Luckily, no one was injured. There was some damage to the exterior of my house. I have reported this issue to the car manufacturer, Mercedes Benz. In response, they have opened a case to research it further.

NHTSA ODI 11475320

Gas smell while driving.Not reported

NHTSA ODI 11456951

Fuel leak from fuel lines from high pressure fuel pump. This is a common problem for C300s from 2015 to 2019, especially in cold weather. Fumes in cabin and fire risk in engine compartment.

NHTSA ODI 11450733

My vehicle: (1) smells of gasoline through the vents. The smell of gasoline is SO STRONG that I have had to pull over and get out of the vehicle. My car has 104,000 miles on it. Not a lot of miles for a 2016. There are NO warning lights on indicating a problem with the vehicle. (2) The silver trim/coating that covers the window buttons and around the entire dashboard has bubbled overnight and is flaking off. It constantly cuts fingers and arms. (3) Approximately 5 months ago the headliner in the car started buckling.

NHTSA ODI 11450187

With cold weather most w205 Mercedes, and specifically the one I have which is a C300 2016 starts having a strong Gas smell when I start the car at cold, and with the cold weather, the smell is getting stronger. There is already a class action going on in a different state concerning that issue, and it is probably a major and safety concern issue in those cars as a hose is a leaking fuel whenever the weather is cold. I ried with the dealership and they said no recall or anything for that issue yet.

NHTSA ODI 11448720

2016 MB 300 C, AWD at 87000 miles started giving gas fuel smell when parked in our garage after driving. I took to a local Foreign Car Repair facility and they found a fuel leak at the fuel injector pump. The mechanic changed the Fuel Injector Pump (Bosch) at a total cost of $745.31. Since the change in the pump, the smell has stopped and I feel safe. Who is responsible to reimburse this cost to me?

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