Which parts fail
Components named in complaints (fuel pump, injectors, fuel tank, hybrid and EV propulsion).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2007 Mercedes-Benz E350 owners, lightly cleaned up (personal details are redacted by NHTSA).
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 NHTSA 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 NHTSA Hotline. The approximate failure mileage was 77,000.
The contact owns a 2007 Mercedes-Benz E350. The contact stated that the vehicle leaked gasoline into the rear driver's side seat causing a pool of gasoline under the seat. The contact stated that the check engine warning light was illuminated. The vehicle was diagnosed but not yet repaired. The manufacturer was informed of the failure. The contact was provided information of a possible manufacturer's recall. The failure mileage was approximately 104,000.
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. …
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. …
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. …
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. …
Fuel tank fuel leak, NHTSA 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.
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.
This report is an additional inspection report for odi number 10745880 on 07/28/2015 and 10855318. It is an identical fire incident that I attach an inspection report for your further investigatio, Mercedes Benz May have to make a recall to replace fuel hose for the public safety with these repeated incidents.
While driving the vehicle on the highway, the engine suddenly lost power, making the vehicle difficult to control while navigating to the shoulder. The engine then stalled and would not start. Vehicle was towed 120 miles to nearest dealer where they replaced the fuel pump and related parts, which fixed the problem, including the following: about two weeks prior to this, another dealership had worked on the car due to intermittent difficult starting. They were unable to duplicate the problem, but did replace fuel filter and related parts. All repairs were out out of pocket expenses. Since then, Mercedes-Benz sent a letter notifying that the warranty had been extended on fuel tank components. The letter included instructions on how to place a claim for prior expenses that are now covered under this extended warranty. …
NHTSA 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…
Fuel System complaints in other E350 years
Frequently asked questions
How common are fuel system problems on the 2007 Mercedes-Benz E350?
NHTSA has 253 complaints about the fuel & propulsion system of the 2007 Mercedes-Benz E350, 72% of the model year's 350 complaints. The component named most often is storage › tank assembly (4 mentions).
Is there a recall for 2007 Mercedes-Benz E350 fuel system problems?
No. NHTSA lists no fuel & propulsion system recall for the 2007 Mercedes-Benz E350, though it has 5 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2007 Mercedes-Benz E350 fuel system problems start?
Half of the complaints with a recorded mileage happened before about 76,000 miles, and 4% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 1 fire and 8 injuries to fuel & propulsion system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.