really awful
Crashes / Fires:
1 / 1
Injuries / Deaths:
4 / 4
Average Mileage:
197,120 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2005 Mercedes-Benz E320 fuel system problems

fuel system problem

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2005 Mercedes-Benz E320 Owner Comments (Page 4 of 4)

« Read the previous 20 complaints

problem #16

Jan 162012

E320 6-cyl

  • 62,000 miles


About a year ago, we noticed a mild gas smell after fill up. The smell used to go away in a matter of hours, so we attributed that to possible spill during refill. Gradually, smell became stronger and lasted longer. Early January 2013, after a recent fill up, we stored the car in garage for 2 weeks while using our other vehicle. The smell became so strong, it was felt in laundry room next to the garage. Smell wouldn't go away so we suspected a gas leak. Upon examination by dealer, it was found that there is significant gas leak under rear seat (passenger side). The leak was from a defective fuel filter and sender unit. We found out that this is a very common defect with 2005 E320 class cars. Indeed manufacturer had issued a recall in 2008 covering leaking fuel filters. The recall included 2005 E320 but apparently did not include my vehicle. This is a serious safety/health hazard that should have been addressed by the manufacturer.

- Arroyo Grande, CA, USA

problem #15

Nov 012011


  • 80,000 miles
The contact owns a 2005 Mercedes-Benz E320. The contact stated that the vehicle emitted a strong fuel odor while the fuel tank was filled. The contact inspected the vehicle and found the fuel tank had leaked and fuel entered the vehicle and collected in the rear driver side floor. The vehicle was taken to the dealer where it was found that the fuel gasket had failed. The vehicle was repaired. The manufacturer was made aware of the failure. The failure mileage was 80,000 and the current mileage 100,000.

- Bristol , VA, USA

problem #14

Jul 012009

E320 6-cyl

  • miles
During the past 2-3 years, my wife and I began to notice a gasoline vapors in our closed garage immediately after our 2005 E320 had been refueled. We also noticed that after a few days driving, the gasoline vapors, diminished. More recently, it also seemed that the gasoline odor has been stronger after refueling. In addition, my wife, while driving this car, has recently begun to smell gasoline vapors from inside the car, and while driving. During a recent visit to my dealer for servicing, I asked them to look into the issue. They removed the rear seat, filled the fuel tank, and then discovered gasoline leaking and puddling around the fuel sending unit. To correct the problem, the dealer told me to either 1) replace the original fuel tank with a slightly redesigned tank, or 2) when refueling, fill the gas tank to a level less than completely full. They admitted that the existing design probably contributed to the leaking. The dealer stated also that a replacement fuel tank would cost us around $2,600 and the cost would not be covered under any vehicle warranty, including the emissions warranty. This car was purchased new in Dec 2004 and now has 75000 mi. In another 2 weeks, it will be 8 years old. My greatest concern is that the gas tank design and subsequent gasoline leakage could contribute to a vehicle fire and serious bodily injury if the vehicle were involved in a collision. This is not to minimize the impact of having to breath gasoline vapors that are inside the vehicle and while driving it. We believe there is a serious design defect, and that it should be remedied by Mercedes-Benz and at their cost as soon as possible. Further, for us to not "fill-up" the fuel tank at any time, does not correct the flawed design, thus is not really an ownership option.

- Houston, TX, USA

problem #13

Nov 282012

E320 6-cyl

  • 100,000 miles


Fuel leak in fuel tank. Around sending unit and somewhere else I can't track down.

- Bartlett, TN, USA

problem #12

Nov 082012

E320 6-cyl

  • 64,163 miles
Very strong fuel odor from car, looked under car expecting a leak but could not see anything, researched online further found similar stories posted by other owners of this vehicle. Asked my Mercedes Benz mechanic, he confirmed that there was a problem with the fuel tanks on these cars and Benz refuses to issue a recall on them! cost according to my mechanic is approx $2000.

- Tucson, AZ, USA

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problem #11

May 022011

E320 6-cyl

  • 90,000 miles
We first noticed a strong fuel smell when the vehicle was filled up, but shortly after we will the vehicle fuel started to drip onto the pavement near the drivers side rear wheel area.

- Wiggins, MS, USA

problem #10

Oct 172012


  • 105,000 miles


The contact owns a 2005 Mercedes E320. The contact stated that while inside of the vehicle, she could smell gasoline but there was no indication of a fuel leak. The vehicle was taken to a mechanic for inspection where they stated that there was a crack in the fuel plate. The vehicle was not repaired. The manufacturer was notified and stated that the failure was common but would not be covered under factory warranty. The failure mileage was 105,000. The VIN was unavailable.

- Union, KY, USA

problem #9

Feb 062012

E320 6-cyl

  • 98,230 miles
Every time the car is filled up with gas, there is a very strong gas smell inside and outside of the vehicle. Removed the back seat and the plate that covers the fuel sending unit and gas puddles up around the seal of the sending unit. Had seal replaced, but that only helped for about a month. It only does this when tank is full (probably due to the pressure in the tank). This problem seems to be getting worse and I try to avoid filling tank completely, but sometimes it's hard to tell when it's getting close to full. The problem only seems to occur on the driver's side of the car, even though there is also a sending unit on the passenger side.

- Nashville, TN, USA

problem #8

Apr 112011

E320 6-cyl

  • 72,319 miles
Fuel tank was leaking under the back seat when fill up tank.

- Bristol, VA, USA

problem #7

Sep 042012

E320 8-cyl

  • 40,876 miles
I filled my gas tank and the next day I smelled gas both near my drivers side wheel well and inside the car in the rear seat area. I filled the car as I always did until click and I am sure none spilled, as I am very fussy about my car. I cannot put the car in the garage as it fills the garage with fumes. This has happened twice now upon fueling up. It never happened before. I have seen where others I know have the same type of problem with the same model Mercedes.

- Buffalo, NY, USA

problem #6

May 202011

E320 6-cyl

  • miles


Noticed a strong gas smell after fill ups. Brought the car to the dealer expecting it to be a seal or something but found out that the top of the tank is prone to cracking around the inlet. When the fuel is full it leaks. Apparently this is a common problem with the E class. Seems very dangerous to have a car that is only a few years old that has a problem with a leaky gas tank" I think it cost between 2K and 3K to replace the tank. I really don't think a car that is that expensive, that new should have a issue like this"

- Desert Hills, AZ, USA

problem #5

Aug 132012


  • 35,000 miles
The contact owns a 2005 Mercedes Benz E320. While parked, the contact noticed a strong fuel odor in and around the vehicle. The vehicle was not taken to the dealer for diagnostics or repairs. The approximate failure mileage was 35,000.

- Boynton Beach, FL, USA

problem #4

Feb 082012


  • 100,000 miles
The contact owns a 2005 Mercedes Benz E320. The contact stated that when the fuel tank was full, he would smell gasoline from the interior of the vehicle. The vehicle was taken to the dealer for inspection who stated that the fuel tank needed to be replaced. The vehicle was not repaired. The manufacturer was not notified. The failure mileage was 100,000.

- Boynton Beach, FL, USA

problem #3

Apr 042012

E320 6-cyl

  • 98,000 miles
After filling the gas tank, I noticed a strong odor after I got home and got out of car. After further inspection I noticed puddle of gas on drivers side of car just in front of rear tire. This happens every time now when I fill up the gas tank. My short term resolution until this can be fixed is to not fill up gas tank all the way.

- Mount Pleasant, SC, USA

problem #2

Apr 042012


  • 98,000 miles
The contact owns a 2005 Mercedes Benz E320. The contact stated that the fuel was leaking. There was also a strong gasoline odor emitting from the rear of the vehicle that would worsen when the fuel tank was refueled to capacity. The vehicle was taken to a private mechanic but was neither diagnosed nor repaired. The manufacturer was notified of the issue who advised the contact that the vehicle was outside of warranty and provided no further assistance. Failure mileage was 98,000 and current mileage was 101,000.

- Mount Pleasant , SC, USA

problem #1

Jun 012012

E320 6-cyl Diesel

  • 107,000 miles
Noticed a strong gasoline odor emanating from the rear of the car. On further investigation, I discovered that there was fuel pooling underneath the drivers side back seat and that two electrical wires were submerged in the fuel collecting underneath the seat. The fuel originated from a crack near the top of the fuel sending unit. This is a potential fire hazard not to mention the significant health issues to all passengers including the nine year old that is transported in this vehicle. This is a known issue and should be thoroughly investigated.

- Miami, FL, USA

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