Tl* the contact owns a 2008 Mercedes benz e350. The contact noticed a strong fuel odor after refueling. The vehicle was taken to the dealer who diagnosed that the fuel system needed to be replaced. The vehicle was repaired at a cost of $3,000. The manufacturer was made aware of the failure. The approximate failure mileage was 124,000.
2008 Mercedes-Benz E-Class fuel system problems
moderate 32 complaints filed with NHTSA · avg repair $1,200 · see fuel system across all vehicles →
Failure mileage
Complaints
32
Recalls
0
Avg fix
$1,200
1injury
When does it fail?
Of the 32 fuel system complaints filed for the 2008 Mercedes-Benz E-Class, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 32 fuel system complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
No new NHTSA fuel system complaint has been filed on this vehicle in over 11 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: The 2008 Mercedes E-Class has a widespread fuel system defect affecting the sending unit seals and fuel tank integrity, causing raw gasoline to pool in the cabin and leak externally—a serious fire and health hazard that Mercedes has declined to recall despite hundreds of complaints. Fuel gauge failures also put drivers at risk of unexpected stalling.
The 2008 Mercedes E-Class fuel system has a documented problem: fuel sending unit seals fail, leaking raw gasoline into the cabin beneath the rear seats and creating overpowering fumes in garages. Owners describe removing rear seat panels to find pools of gasoline and fuel-saturated foam. The smell intensifies when the tank is full and dissipates only as the fuel level drops below 3/4 tank. One owner reported being unable to breathe in the garage and had to park outside for safety; another's daughter became sick from fumes. The fumes seep into home living areas, creating fire risk from ignition sources like water heater pilots.
Beyond leaks, the fuel gauge sender malfunctions, showing incorrect readings. One owner's wife experienced an unexpected stall on the freeway in the fast lane despite the gauge indicating fuel remained. Another owner's vehicle stalled in an intersection with no warning.
Repair costs reported range from $2,000 to $3,000 for sending unit and seal replacement. A class action lawsuit was filed in the Northern District of Georgia. NHTSA had received over 528 complaints as of June 2013. Mercedes initially denied the problem and refused warranty coverage, though one owner with certified pre-owned warranty coverage had repairs covered.
Same Mercedes-Benz E-Class fuel system reports on nearby years: 2005 · 2006 · 2007 · 2009
Failure modes owners describe
Fuel sending unit seals/gaskets failing; pooling gasoline in cabin
Fuel sending unit seals or gaskets deteriorate, allowing raw gasoline to leak into the cabin area beneath the rear seats and into the fuel tank well. Owners report removing rear seats to find pools of gasoline or saturated foam, creating fire and health hazards.
When: Typically occurs when tank is filled to full or nearly full; appears across all mileages reported (55k to 140k+)
Symptoms owners cite: Strong gasoline odor in cabin and garage, especially after refueling or when parked in enclosed space; Gasoline pooling beneath rear seats after removing seat covers; Fuel-saturated seat foam in rear compartment; Headaches and health effects from fume exposure; Smell dissipates as fuel level drops below 3/4 tank; Visible gasoline stains around fuel tank sides
Repairs/costs cited: Fuel sending unit replacement (along with seals/gaskets) reported at costs ranging from $2,000 to $3,000. Dealership split cost with one owner at $2,000 total repair.
Recalls/TSBs owners mention: Class action lawsuit filed in Northern District of Georgia; NHTSA received 528+ complaints (as of June 2013); Mercedes initially denied problem and refused warranty coverage; one owner with CPO warranty had repair covered.
Fuel tank structural failure/fracture
Fuel tank develops cracks or fractures, causing raw gasoline to leak externally from the tank itself and saturate the fuel tank compartment area.
When: Reported at 55,000 miles and other lower-to-mid mileages
Symptoms owners cite: Large puddles of fuel leaking from vehicle exterior; Gasoline odor emanating from rear wheel arch/driver side area; Intermittent drops of gasoline from fuel tank area
Repairs/costs cited: Tank replacement required; owner paid out-of-pocket with no manufacturer assistance
Fuel pump electrical failure and fuel gauge sender malfunction
Fuel pump fails completely or fuel gauge sender unit malfunctions, causing erratic fuel level readings or sudden loss of fuel supply while driving.
When: Approximately 140,000 miles (fuel pump); fuel gauge issues reported across multiple mileages
Symptoms owners cite: Engine failure to start or sputtering while idling; Vehicle stalled in intersection with no warning despite gauge showing fuel remaining; Fuel gauge reads inconsistently; levels jump up and down; Gauge never drops below half-tank mark despite driving; Vehicle runs out of fuel on freeway despite gauge showing 231 miles remaining or 1/2 tank; No low-fuel warning before complete fuel loss
Repairs/costs cited: Fuel pump replacement required (not completed in one case); fuel tank sensor replacement performed but failure persisted
Recalls/TSBs owners mention: Manufacturer notified; offered no assistance
Defective fuel line fitting causing system-wide leaks
A defective fitting in the fuel line connection from tank to motor allows gasoline to escape and accumulate in the rear seat area.
When: Present on 2008 E350 reported to dealer for inspection
Symptoms owners cite: Gasoline dripping under vehicle in rear seat area; Strong gas odor inside and outside vehicle; Visible fuel leaking from right rear seat area
Repairs/costs cited: Dealer identified defective fitting requiring fuel line/system replacement
Synthesized from 32 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 5 most recent
The fuel gauge has become inconsistent during the past few months. The fuel levels run up and down and never go below the half way mark. Was driving on the freeway yesterday and the car completely ran out of gas. No warning or indication of low gas levels. Had actually show 231 miles remaining. I was able to pull over and get assistance. However, could have been very dangerous had it not been the…
After refueling my car's gas tank I began to notice some sort of gas leakage. It's especially pronounced when the car is parked in the garage since the fume is unmistakable. There is apparently a fuel leakage near the rear tire (driver's side). I'm concerned that if there were anything in the garage that is ignited it would cause some terrible incident. After I brought my car in for service I…
The contact owns a 2008 Mercedes-Benz E350. The contact stated that the vehicle failed to start after several attempts. In addition, the engine began to sputter while idling. The contact had taken the vehicle to an independent mechanic where the fuel tank sensor was replaced; however, the failure persisted. The contact also stated that while his daughter was driving at an undisclosed speed, the…
Vehicle diagnosed with a leaking fuel tank. *tr
Had fuel system trouble with your 2008 Mercedes-Benz E-Class?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the fuel system problem on the 2008 Mercedes-Benz E-Class?
It's a documented issue but not catastrophic. 32 complaints have been filed. Repairs average $1,200 and most owners catch it before it causes a breakdown.
At what mileage does the fuel system typically fail?
Across the 29 complaints that reported odometer mileage, most fuel system failures cluster between 59,838 and 85,000 miles, with the median around 69,000. A quarter of owners report trouble before 59,838; a quarter make it past 85,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $1,200 for fuel system repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to fuel system?
No active recalls currently cover fuel system issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2008/Mercedes-Benz/E-Class.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.