Mercedes Benz Selma, Texas Dearlership refuses to service known issue with fuel system leaks on C300 because they cannot reproduce problem. Problem is that don't have the correct environment to test for this know problem. -??There is a short rubber fuel line/hose in the engine compartment that is attached with compression clamps; the hose connects the fuel line from the gas tank to the high pressure fuel pump. When it gets cold outside (below ~40 degrees Fahrenheit) the clamps loosen a bit and the hose will leak gas. This is what you will smell in the cabin. Once it gets warmer outside or the engine bay warms up, the smell will tend to go away. No clue how they've gone all this time without a safety recall, but I did make a report to the NHTSB last month when it started happening to me.-?? The fix is to have the rubber line w/clamps replaced. If you still have warranty the dealer can take care of it. (Provided they are configured to test for this defect properly which they are not. Bottom line, fuel leaks in garages like mine with a gas water heater are a BIG issue. I alerted the dealership that they and MB would be liable if something were to happen since they refused to repair vehicle.

- New Braunfels, TX, USA

Engine light on smells gas constantly tried to change oil that did not work light came back

- Oakland , CA, USA

It is such a common issue reported by many 2016 c300 owner who experienced error code p052e bad Pve valve. My car only has 40,000 miles. I think the manufacture should be responsible for a recall. https://mbworld.org/forums/c-class-w205/796292-2016-c300-p052e-positive-crankcase-ventilation-regulatory-valve.html

- Syosset, NY, USA

I was just driving normally boom engine light comes on take it to the dealership and it come up as crank case vent line which they quoted me 2300$. I think this should be recalled I have seen so many people with the same issue I have actually had someone tell me this was the only major problems with the w205 c300 before this happened. I think it should be recalled because from what I-??ve seen it happens to every single c300 just at different mileages. Hopefully this will get a recall because it seems to be a very common issue and should be covered by the dealer.

- Roanoke, IN, USA

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).

- Niantic, CT, USA

Engine misfire, rough idle, shake when come to red light stop, burnt smell inside cabin, loss of power

- Sherman Oaks, CA, USA

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).

- Hartland, WI, USA

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.

- Troy, MO, USA

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

- Arlington, TX, USA

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.

- San Diego, CA, USA

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

- Roselle Park, NJ, USA

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.

- Carmel, IN, USA

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

- Golden, CO, USA

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.

- Canton, GA, USA

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;

- Cincinnati, OH, USA

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.

- Washington, DC, USA

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

- Melissa, TX, USA

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

- Porter Ranch , CA, USA

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

- Sunrise, FL, USA

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.

- Miami, FL, USA