Fuel tank, filler or EVAP failure on the 2004 Mercedes Benz E320
When fuel tank, filler or evap failure gets reported
Owners of the 2004 Mercedes Benz E320 report fuel tank, filler or EVAP failure at a median of 82,500 miles. A quarter of the reports come in before 65,000 miles and a quarter after 115,000 miles, from 25 reports that carried an odometer reading.
A part like this is normally expected to survive 88,000 miles. It is the 3rd most-reported problem on this model year.
The mileage distribution
The reported range runs from 45,000 miles at the tenth percentile to 150,000 miles at the ninetieth, a spread of 103,992 miles across the middle 80% of reports.
When the reports scatter this far, the mileage is telling you about how these cars were driven more than about the part itself.
8% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 45,000 miles | 66,148 miles | 82,000 miles | 114,000 miles | 148,992 miles |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Putting it right typically runs $250–$1,800 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
The same failure on other years
The same failure is reported on 4 model years of this car. It shows up earliest on the 2005, at a median of 80,000 miles, and latest on the 1996 at 150,000 miles.
By volume the 2003 carries the most reports, with 33; the 2004 has 28. A mode that appears across most years of a model is usually a design choice rather than a bad batch.
If one year stands out to the left, that is the year to avoid; if the whole line sits at a similar mileage, this is wear rather than a defect in one production run.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
A strong odor of gasoline emanates from car after filling it up with gasoline. Had a mechanic trouble shoot and it was determined to be a leak in the fuel sensor which was causing gasoline to puddle on top of fuel tank underneath the back seat of the automobile. *kb
Nhtsa action number: pe12001 began smelling fuel coming from rear driver's side area (under rear seat) once fuel tank was fully filled up. The smell would persist until a little above 3/4's of the tank remaining. About two months later, when trying to fill tank up all the way, gas pump would click off before filling up (with about 2 or 3 gallons still empty in the tank). Beginning of march, the check fuel cap warning would come on in the instrument cluster. Fuel cap was replaced and still same error shows. *tr
Tl* the contact owns a 2004 mercedes benz e320. The contact stated that while driving at various speeds, the check engine lamp would illuminate and fumes were emitted into the vehicle. The vehicle was taken to the dealer who diagnosed that there was a leak in the fuel tank. As a result, the filler neck needed to be replaced and the fuel tank needed to be inspected thoroughly. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure mileage was 73,000 and the current mileage was 75,500.
Also reported on the 2004 Mercedes Benz E320
Fuel leak or fuel odor
Other fuel system problem
Other brake problem
Fuel pump failure
Loss of braking
Fuel gauge or level sensor failure
How far this goes
Complaints are voluntary, so 28 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does fuel tank, filler or evap failure happen on the 2004 Mercedes Benz E320?
Across 25 owner reports that included an odometer reading, half were filed by 82,500 miles. A quarter were filed before 65,000 miles and a quarter after 115,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is fuel tank, filler or evap failure on the 2004 Mercedes Benz E320?
28 reports have been filed with NHTSA, about 5.9 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed