I first noticed the problem around March 2026. When I fill the fuel tank of this 2007 Mercedes-Benz E350, gasoline pools on top of the tank beneath the rear seat, inside the passenger cabin. I have breathed gasoline fumes from it. There was no fire or crash. An independent Mercedes specialist's records include a March 2026 recommendation noting a very fine EVAP leak at the fuel tank and/or vapor line and that the tank is no longer available. On May 29, 2026 (65,138 miles), with the check-engine light on and a strong fuel smell inside the vehicle, the shop replaced a leaking left fuel pump and seal. A fuel-system test that day indicated further checks were required. The gas pooling continued after the pump was replaced. On July 28, 2026 (66,067 miles), the shop noted that the fuel tank is warped. I wrote to Mercedes-Benz USA on October 13 and October 16, 2026 with my service records and have not received a response.
2007 Mercedes-Benz E350 fuel system problems
254 complaints (72% of all complaints for this car). Typical mileage when it fails: 76,000.
- owner complaints
- 254
- of this car's complaints
- 72%
- typical mileage
- 76,000
- crashes
- 0
- recalls
- 0
Which part fails
- Storage: tank assembly4
- Delivery: fuel pump1
At what mileage
Complaints by mileage at the time of the problem.
Mercedes-Benz E350 fuel system problems in other years
Specific symptoms reported on the 2007 Mercedes-Benz E350 fuel system
Phrases found in the owners' own descriptions, so one complaint can mention several symptoms.
Related recalls
No recalls on record for this model year.
Related investigations
Fuel Leakage From The Fuel Tank
The Office of Defects Investigation (ODI) opened this investigation on January 23, 2012 as PE12-001 based on 20 consumer reports in model year (MY) 2003-2006 E55 AMG vehicles.Based on new reports in other E-Class vehicles, ODI upgraded the investigation to Engineering Analysis (EA) 13-003 on March 15, 2013, and expanded the scope to all E-Class vehicles through MY 2008.The complainants alleged a strong odor of gasoline fuel both inside and outside of their vehicle, particularly after refilling the fuel tank.Many of the complainants noted that the odor subsided or went away after driving some distance thereby lowering the fuel level in the tank.Other owners reported they would only fill the tank to about three quarters full to avoid the odor altogether.Some complainants alleged fuel leaked from the fuel filter/sender, located on the top of the fuel tank on the driver's side, and collected on top of the tank.There were also allegations that the fuel leaks were associated with an Emissions Recall Campaign (No. 2008020001) conducted by Mercedes-Benz USA, LLC (Mercedes) in 2008 on MY 2003-2006 E-Class and CLS-Class AMG models.The issue in the recall involved small cracks in the pressurized outlet fitting of the fuel filter/sender.AMG vehicles are high performance models that operate at higher fuel pressure and use a different fuel filter/sender and fuel pump than non-AMG models.Information on Recall No. 2008020001 is available from the U.S. Environmental Protection Agency (EPA) website at www.EPA.gov.ODI's investigation found various leak sources that are unrelated to the outlet fitting cited in the EPA recall campaign.Through interviews with complainants, field inspections of complaint vehicles, and the collection and laboratory analysis of failed parts, three identifiable leak sources were found.The component parts and areas of the leaks involve the On-Board Diagnostic fuel tank pressure sensor (located on top of the fuel filter/sender), the outlet of the centrally mounted fuel tank fuel filling limiter valve, and the top of the fuel pump. These areas of leakage are located at the top of the fuel tank in unpressurized parts of the fuel system. When the tank is full, fuel can slowly weep/seep from micro-cracks in these components and may collect in cavities on top of the filter/sender, pump, or tank.Contrary to complainant's allegations that fuel entered the inside of their vehicle under the rear seat bench, neither ODI nor Mercedes found a plausible way for this to occur.The fuel tank is located outside of the passenger compartment, attached to the underside of the vehicle.The service access ports for the fuel filter/sender (driver's side) and fuel pump (passenger's side) are located under the rear seat bench, covered by a steel plate, sealed and bolted to the vehicle floor.When technicians service the fuel filter/sender, which has a regularly scheduled 60,000 mile service interval, and/or the fuel pump, the work is performed from inside the vehicle by working through the access ports.By letter dated September 4, 2014, Mercedes has notified the agency that it will extend the original warranty coverage to 15 years and unlimited mileage on Covered Fuel Tank Components in E-Class vehicles in MY 2003-2009 and CLS-Class vehicles in MY 2006-2011.The covered fuel tank components for the warranty extension include the fuel tank, fuel filter/sender, fuel pump, and all related gaskets/seals and retention rings.ODI is closing this investigation based on the manufacturer's extend warranty of the affected fuel system components and in consideration that the nature of the leaks does not appear to present an un
EA13003
What 2007 Mercedes-Benz E350 owners say
Most recent owner complaints, unedited.
Recently my wife and I noticed a very strong fuel smell from cabin of this car. When I inspected and lifted the seat there was a puddle of fuel leaked over the sending unit. This is extremely dangerous and potentially deadly for my family especially with 2 young children who are always seating in back seat. Upon checking with Benzel Busch Mercedes dealer in Englewood New Jersey, they said they cannot fix my issue because my warranty has expired. I am now writing to you to help me as I feel this should strictly be a recall and Mercedes USA should be required to fix this leak free of charge. Please understand that out of pocket will be more than $8,000 for this repair and I do have the means to come up with that amount of money. Upon checking on internet there are many E class Mercedes Benz between years 2003-2009 that have this issue. Could you please help me resolve this matter especially this being an extremely dangerous situation. I can be contacted via email: [XXX] or phone: [XXX] . Thank You Sincerely [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The contact owns a 2007 Mercedes-Benz E350. The contact stated that while refueling the vehicle, the vehicle emitted an abnormally strong gasoline odor inside and outside the vehicle. The vehicle was taken to the dealer and the contact was informed that the failure was related to an unknown the federal safety agency ID Number; however, the campaign had expired. The vehicle had not been repaired. The manufacturer was made aware of the failure and referred the contact to the federal safety agency Hotline. The approximate failure mileage was 77,000.
Fuel smell coming from the rear, car is a pzev and out of warranty, smell is very strong and I am unable to drive it with a child in the back because they get dizzy. Unable to fill up with gas up to a certain point or smell will linger.
Fuel sending unit warranty was extended but only for a short time. Mine has failed and gas is leaking into the car and MB won’t honor warranty because it expired on my car and entire fuel tank has to be replaced.
Fuel tank and fuel parts leaking. 2 repairs and car often smells of gasoline especially in the garage.
Fuel tank fuel leak, the federal safety agency Action Number EA13003 I purchased a 2007 Mercedes E Class used a few months ago, and recently I noticed a fuel leak, strong fuel smell outside of vehicle when fuel tank is filled higher. More fuel means more fuel odor. Upon research, it seems like there was a warranty extension for 15 years, and with my luck, warranty extension ran out just after I bought the car but before I noticed the problem. As fuel is a safety issue and can easily ignite, and also affects emissions, I feel like the remedy should not just be a 15 year warranty extension, but longer as cars are staying on the road longer and longer. I'm sure I'm not the only one with this issue out of warranty extension period.
Due to the odor of gasoline both inside and outside my car I brought my car to the local Mercedes’ dealership. Upon inspection they found a small crack in my fuel tank which allowed gasoline to leak into another compartment. The dealer stated they would not be able to replace fuel pump without replacing the gasoline because of the “danger and risk of fire”. I believe that the leakage of gasoline and the fumes associated inhaled presents a very real danger, and risk to health. Upon research I found that this is a major issue that has been addressed by your department. After a 3 year investigation this investigation was closed due to the extension of the manufactures warranty to 15 years. My car is 8 months out of the extended warranty. When speaking to Mercedes’ Benz hotline, the representative stated receiving several phone calls recently with reports of the same issue. I appreciate your attention to this matter. I am hoping this case with be reopened, and the manufacturer held responsible for replacing faulty fuel tanks.
Vehicle fuel system known component issue, fuel pump failure, intermittent. Driving vehicle can lose power at speed, causing potential loss of control as hydraulic assist to steering and braking fails with engine. This known issue has intermittently cause our car to fail to start, or fail in operation. This was a known issue, the manufacturer was allowed to avoid a recall by extending the warranty for this component (fuel pump in fuel tank assembly) to 15 years. Our car started showing this around that time (3 months ago, when extended warranty expired), however we were not then aware of said warranty. Now that we've been two months of diagnosis and discussions with MBUSA Customer Care, they are not willing to replace the known failure point as warranty expired 3 months ago. This should have been a recall from the beginning, and now we, and many others to come, will have the value and usefulness of our vehicles reduced or eliminated. Those not aware of the potential failure of this very expensive part, will be at risk every time they operate their cars at speed on the public highways. the federal safety agency should never have allowed this warranty extension scheme to substitute for a recall. There is no way to predict failure, and entire fuel tank assembly replacement is <$4,000. Fuel pump is not individually accessible or available for replacement, only entire tank assembly in these PZEV vehicles is available. Mercedes-Benz is shirking responsibility here, and flipping it over to the dealerships and consumers.
The component/s that have failed are (reputedly) the fuel system resulting in significant fuel fumes permeating into the cabin of the vehicle as well as being very evident around the rear outside of the vehicle. This seems to be more obvious after the car has been filled with fuel. Having fuel fumes leaking into the cabin of the car should be self evident as a risk to anyone travelling in the vehicle, especially in the rear seats. The fumes eminating from the car, externally, are a potential fire hazard should anyone walk by with a cigarette or naked flame. This is an on going problem well known to Mercedes Benz and one that should have been the subject of immediate recalls by MB and not subject to a Mileage, Time Frame or VIN number. Why should I, or anyone, have to foot a fairly significant bill, for fixing a manufacturing fault just because the previous owners didn't get the problem fixed and I purchased the vehicle after some 15 year warranty time frame? This issue could result in someone's death if Mercedes is not forced to remedy it and by remedy it I mean for ALL 2007 E350's to be recalled unconditionally. Consumer would like to amend the complaint to include the recall of ALL Mercedes E350 for the years 2006 and 2009 for inspection of the cause of the problem and the repair of those vehicles where repairs are needed at Mercedes Benz cost.
Questions about the 2007 Mercedes-Benz E350 fuel system
Does the 2007 Mercedes-Benz E350 have fuel system problems?
Owners have filed 254 complaints about the fuel system of the 2007 Mercedes-Benz E350, 72% of all its complaints, more than any other problem.
At what mileage do 2007 Mercedes-Benz E350 fuel system problems start?
The typical (median) mileage in owner complaints is 76,000 miles.
Was there a recall on the 2007 Mercedes-Benz E350 fuel system?
There is no recall for this problem on this model year.
What year does the Mercedes-Benz E350 have the most fuel system problems?
The Mercedes-Benz E350 model years with the most fuel system complaints are 2007 (254 complaints), 2006 (219 complaints) and 2008 (87 complaints).
Other 2007 Mercedes-Benz E350 problems
Engine 33Transmission 21Electrical 17Seats 12Suspension 9Tires 8Visibility 7Wheels 5Lights 4Airbags 3Brakes 3Steering 3Acceleration 2Body 2Driver assistance 2Seat belts 2Locks 1
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