2014 Mercedes-Benz E350 Fuel system Problems

Vehicle subframe corrosion (manufacturer extended warranty offered). Rear brake lines corroded/leaking. Vehicle leaks fuel; steel fuel line corroded. Vehicle has about 105k miles. Minor fire started when yard maintenance came in contact with fuel saturated ground where vehicle had been parked/moved out of the way just prior. With rear suspension subframe springs corroded, vehicle bottom can contact road surface while driving, scraping steel exhaust with fuel present. EXTREMELY dangerous. Local Sunbury Ohio Mercedes dealership inspected then offered subframe replacement. Stated it was leaking fuel and not hydraulic fluid we originally thought. Brake, suspension and fuel line corrosion repairs were quoted in excess of $4,000, which was a "great deal" according to them "because the subframe would already be removed and would make it much easier."

NHTSA ID

11749054

Incident

Jul 6, 2026

The contact owns a 2014 Mercedes-Benz E-Class. The contact stated while driving at an undisclosed speed, the contact noticed fuel odor in the interior and exterior of the vehicle. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The dealer was made aware of the failure. The contact referenced an unknown recall; however, the VIN was not associated with a recall related to the failure. The manufacturer was made aware of the failure. The contact was advised to take the vehicle to the dealer for diagnostic testing. The failure mileage was approximately 78,000.

NHTSA ID

11738986

Incident

Apr 20, 2026

Mileage

78,000 mi

Strong smell of fuel from the rear wheel well areas, especially after a fill. I have been searching the recalls and found a 15V-792 / 2015110006 Recall Summary as well as a 15V-792 / 2015110006 Recall Solution. Please advise if this is of safety concern and the dealer should address this concern. [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11732141

Incident

Apr 18, 2026

The contact owns a 2014 Mercedes-Benz E350. The contact stated that while the vehicle was parked, fuel was leaking from near the fuel tank. There was no warning light illuminated. The contact stated that the failure was intermittent. The vehicle was taken to the dealer; however, the failure could not be duplicated. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 40,905.

NHTSA ID

11728634

Incident

Apr 1, 2026

Mileage

40,905 mi

Issue with fuel injection for Benz E350 2014 2014 Mercedes-Benz E350 fuel injection issues often stem from faulty injectors causing misfires, often on Cylinder 5, or a recalled fuel feed line. Symptoms include rough idling, reduced gas mileage, stalling, and check engine lights (P0300-P0306 codes).

NHTSA ID

11723123

Incident

Mar 9, 2026

2014 Mercedes e350 these models as well as those from2009-2015. Have recall on subframe but the brake lines rust out and deteriorate as mine has now done. If you go on line you tube etc. you will see the issue and all complaints. I had my subframe replaced under warranty at Mercedes of flemington. About 1 1/2 years ago. While it was being serviced they asked me if I wanted to replace brake lines for $1200 since they had this part out job would be easy. So this means Mercedes is well aware of the deterioration of these line the man at mb said the metal was inferior and this is result. On YouTube it was stated that individuals took mb to court or accountability for this but results were negative. Yet problem exists. If you breaks fail while driving it is very dangerous. Also I believe there is a recall for gas lines for my model 2014 manufactured from June and July. The brake lines on my vehicle are rusting as is gas tank. This also is dangerous condition should accidents occur the lines because compromised with rust can much easily rupture causing fuels to spew out causing possible explosive condition. I have pictures and can forward

NHTSA ID

11693371

Incident

Oct 8, 2025

Fuel smell in the rear of the car, it was checked by a indepent mechanic and the tank is leaking fuel. They said is the Fuel filter which is usually faulty in this model. It seems the car can catch fire according to the mechanig. No warnings of the leaking in the dashboard, only the strong smell.

NHTSA ID

11687667

Incident

Sep 7, 2025

The contact owns a 2014 Mercedes-Benz E350. The contact stated that while driving at an undisclosed speed, there was an abnormal fuel odor inside and outside of the vehicle. In addition, the contact stated that the vehicle was consuming an excessive amount of gasoline. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The contact stated that the failure persisted. Upon investigation, the contact related the failure to NHTSA Campaign Number: 15V088000 (STRUCTURE). The manufacturer was not made aware of the failure. The failure mileage was unknown.

NHTSA ID

11673382

Incident

Jul 14, 2024

The contact owns a 2014 Mercedes-Benz E350. The contact stated that while the vehicle was parked in the garage, there was an abnormally strong fuel odor coming from the vehicle. The vehicle was taken to an independent mechanic, who diagnosed the vehicle with a fuel tank leak. The contact was informed that the fuel tank needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 15V792000 (Fuel System, Gasoline); however, the VIN was not included in the recall. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was unknown.

NHTSA ID

11666239

Incident

Jun 1, 2025

The contact owns a 2014 Mercedes-Benz E350. The contact stated that after parking the vehicle in the garage, there was an abnormal fuel odor outside the vehicle. The contact stated that there were no signs of a fuel leaked on the garage floor. The contact had not taken the vehicle to a local dealer or independent mechanic, and the vehicle was not diagnosed or repaired. The contact researched online and related the failure to NHTSA Campaign Number: 15V792000 (Fuel System, Gasoline). The manufacturer was informed of the failure and the contact was informed that the VIN was not included in the recall. The contact was referred by the manufacturer to the NHTSA Hotline to report the failure. The failure mileage was approximately 118,000.

NHTSA ID

11664889

Incident

Apr 29, 2025

Mileage

118,000 mi

I had a sudden smell of fuel when I looked outside the vehicle I noticed a leak under driver side back seat area under vehicle

NHTSA ID

11658966

Incident

May 4, 2025

The contact owns a 2014 Mercedes-Benz E350. The contact stated that there was an abnormal fuel odor inside and outside the vehicle. The contact was informed by his wife of the failure, but recently the fuel odor had become more prominent. There was no warning light illuminated. The vehicle was taken to an independent mechanic where the contact was informed about a fuel leak. The fuel tank access underneath the rear seat had leaked fuel into the interior and exterior of the vehicle. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 80,000.

NHTSA ID

11641796

Incident

Mar 1, 2023

Mileage

80,000 mi

The contact owns a 2014 Mercedes-Benz E350. The contact stated while driving at an undisclosed speed, the contact noticed a fuel odor coming from the exterior of the vehicle. In addition, the contact stated that the fuel odor was around the exterior of the vehicle while the vehicle was parked. The contact stated that the failure was persistent. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was made aware of the failure. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 100,000.

NHTSA ID

11639735

Incident

Dec 30, 2024

Mileage

100,000 mi

The contact owns a 2014 Mercedes-Benz E350. The contact stated that while her daughter was driving at an undisclosed speed, there was a fuel odor perforating through the interior of the vehicle. The driver later reported feeling ill which she attributed to the fuel odor in the vehicle and determined to discontinue driving the vehicle. No warning lights were illuminated. The vehicle was towed to an independent mechanic, who was able to smell the fuel odor but was unable to provide a diagnosis. The vehicle was not repaired. The vehicle was towed to another independent mechanic, who diagnosed a failure with the fuel pump. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 15V792000 (Fuel System, Gasoline), but the VIN was not included. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was 147,000.

NHTSA ID

11620427

Incident

Oct 17, 2024

Mileage

147,000 mi

Fuel system gasoline smell of gas and the threading in the crease of seats coming apart .. I noticed that some of the E350 2014 has the fuel systems gasoline problem … all of the E350 are having this fuel gasoline problem

NHTSA ID

11618976

Incident

Oct 7, 2024

The contact owns a 2014 Mercedes-Benz E350. The contact stated that while operating the vehicle, there was an abnormal fuel odor inside the cabin of the vehicle. The vehicle was taken to the local dealer but no cause for the odor was found. The vehicle continued to experience failure. The manufacturer was not contacted. The failure mileage was unknown.

NHTSA ID

11617648

Incident

Oct 2, 2021

I have a 2014 E350 Coupe. It has a major fuel leak that is immensely dangerous and could cause immediate harm/death if I did not remove the seat and inspect the fuel line. There is a recall on the 4 door model for reference. 15V-792 / 2015110006 Recall Summary A fitting that joins the fuel hose and fuel feed line may develop a leak or completely disconnect. This can cause a fire hazard, fuel odor and potentially stall the engine while operating the vehicle. The fuel line fitting connecting the fuel hose and fuel feed line may be flared improperly, causing a possible leak or disconnection of the fuel line. Dealers will install the correct fuel line free of charge to resolve the concern. Mercedes-Benz USA, LLC. (MBUSA) is recalling certain model year 2014 E350 and E350 4Matic sedans manufactured June 4, 2014, to July 9, 2014. The affected vehicles were built with a fuel feed line that has a single flare fitting instead of a double flare fitting.

NHTSA ID

11616525

Incident

Sep 18, 2024

The contact owns a 2014 Mercedes-Benz E350. The contact stated on several occasions when the vehicle was turned off, the contact became aware of an abnormally strong gasoline odor. The vehicle was taken to a dealer where it was diagnosed and determined that unknown parts needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 88,950.

NHTSA ID

11611544

Incident

Aug 20, 2024

Mileage

89,000 mi

Fuel Leakage from the top of the Fuel Tank, leaking underneath the back seat. I'm told there was a past campaign to fix these issues in the Sedan Mercedes Benz E350. The problem was found by the fumes in my garage where I park the vehicle. My smoke and carbon monoxide alarm kept going off inside my house, and I had to call the fire department to help me identify where the fumes were coming from. No warning lamps or messages on the vehicle are present. When I called the dealership they told me there hasn't been a recall on the vehicles. I have had a diagnostic with the dealership.

NHTSA ID

11607985

Incident

Aug 9, 2024

The contact owns a 2014 Mercedes-Benz E350. The contact stated there was a fuel burning odor emitting from the vehicle when in the vehicle was parked. There were no warning lights illuminated. The vehicle had been taken to the dealer and diagnosed with a fuel leak coming from the fuel tank. The contact was informed that the fuel tank needed to be replaced. The vehicle had not been repaired. The manufacturer was made aware of the failure. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was 87,000.

NHTSA ID

11606723

Incident

Aug 1, 2024

Mileage

87,000 mi

The contact owns a 2014 Mercedes-Benz E350. The contact stated while driving at various speeds, there was a gasoline odor inside the vehicle. There were no warning lights illuminated. The vehicle was taken to a local dealer where it was confirmed that the vehicle was not under recall. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 15V792000 (Fuel System, Gasoline); however, the VIN was not included. The manufacturer was not made aware of the failure. The failure mileage was approximately 166,000.

NHTSA ID

11604456

Incident

Jul 25, 2024

Mileage

166,000 mi

My Cars Fuel Sender/Pump unit is leaking and it was diagnosed by Mercedes-Benz of chandler. I will attach report for same. they have given estimate for 1800 to repair it. this is common problem across multiple Mercedes vehicles and they have done recall on other models on this but they have excluded my model. since the Problem is generic to many mercedez vehicles they should honor this in safety recall. please see this article about this recall on other models. they have highlighted to me that its a safety issue as there is strong fuel odor from car on this. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11550907

Incident

Sep 20, 2023

I notice a strong smell of gas inside my vehicle immensing from the back seat area of my car.and it's stronger everytime bi fill up the gas cap is placed back correctly and no top off ever

NHTSA ID

11509139

Incident

Jan 1, 2023

Very strong gas smell enters the cabin and surrounding exterior of the car after fill up. Seems to be a very common problem with this model and follows the same issues with previous years that were filed with the NHTSA and ultimately needed to be repaired by MB. The problem appears to be with the components of the fuel tank immediately under the rear seat. I am at the point where this has become a very dangerous hazard that consumers should know that the manufacturer should address and that consumers should not have to pay for repairs.

NHTSA ID

11498504

Incident

Jun 30, 2021

On my way to work lady Tuesday 11/1/22 just a few blocks from my AT&T office I started smelling fuel. I thought it was an lad car next to me. Looking at the rear mirror I noticed a line of fuel following me. By the time I pulled a side and shut down the vehicle I lost the full tank. The vehicle was towed and is still at Mercedes Benz of Plano, Plano, TX. The tech said the orings had gone bad and the hose deteriorated. It seems very similar to this recall https://www.edmunds.com/car-news/2014-mercedes-benz-e350-recalled-for-fuel-line-problem.html I called Mercedes USA and opened CASE [XXX]. No reply yet. Fortunate the car didn’t catch on fire or someone thrower a cigarette while I was driving they downtown. Leaking fuel should not happen INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA ID

11492738

Incident

Nov 1, 2022