Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG.
How far a 2004 Mercedes-Benz G-Class goes on a tank
Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 12 MPG, a full 25.4-gallon tank covers about 305 miles.
Gauge
Gallons
Highway miles
City miles
Full
25.4
330
279
3/4
19.0
248
210
1/2
12.7
165
140
1/4
6.4
83
70
1/8
3.2
41
35
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 1,250 gallons, roughly 49 full tanks.
Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.
At 25.4 gallons, the G-Class's largest tank ranks second of the six 2004 SUVs compared here. The Porsche Cayenne carries the most (26.2 gal) and the Lincoln Aviator the least (22.5 gal).
Other 2004 SUVs of a similar size, one model per brand.
2004 Mercedes-Benz G-Class fuel system recalls
NHTSA lists 1 fuel-system recall for the 2004 Mercedes-Benz G-Class, out of 2 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.
Delivery · Hoses, lines/piping, and fittingsAug 29, 2005 · NHTSA 05V378000 · Mercedes-Benz USA, LLC. · 487 vehicles
On certain sport utility vehicles, the fuel return hose between fuel tank and return line can be permeated with fuel. This situation results from the expansion and contraction of the hose under pressure causing microcracks in the hose material.
Risk and remedy
Risk: These microcracks may cause fuel leakage. Fuel leakage in the presence of an ignition source could result in a fire.
Remedy: Dealers will inspect and replace all fuel return hoses with the appropriate hoses free of charge. The recall began on september 27, 2005. Owners may contact mercedes benz at 1-800-367-6372.
What is the fuel tank capacity of the 2004 Mercedes-Benz G-Class?
The 2004 Mercedes-Benz G-Class holds 25.4 gallons (96 liters) on every trim we list.
How many gallons and liters does the 2004 Mercedes-Benz G-Class gas tank hold?
The 2004 Mercedes-Benz G-Class tank holds 96 liters, or 25.4 gallons in US gallons.
How far can a 2004 Mercedes-Benz G-Class go on a full tank?
About 330–356 miles on the highway and 279–305 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.
How many miles can a 2004 Mercedes-Benz G-Class go on a quarter tank?
About 83 highway miles or 70 in town from the 25.4-gallon tank, which has roughly 6.4 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2004 Mercedes-Benz G-Class take?
Premium unleaded (required). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2004 Mercedes-Benz G-Class?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 25.4-gallon tank from empty costs $134.11. It ranges from $116.08 in the Gulf Coast to $161.54 in California.
How much does a full tank of gas weigh in a 2004 Mercedes-Benz G-Class?
About 157 pounds for the 25.4-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2004 Mercedes-Benz G-Class have a bigger gas tank than the Lexus LX 470?
No, they match: both top out at 25.4 gallons in 2004.
Has the 2004 Mercedes-Benz G-Class had a fuel pump or fuel system recall?
Yes. NHTSA lists 1 fuel-system recall for the 2004 Mercedes-Benz G-Class: 05V378000 (delivery · hoses, lines/piping, and fittings). Check your VIN at nhtsa.gov/recalls to see if your car is affected.
Sources
Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
MPG and range: EPA ratings (fueleconomy.gov). Range is tank size times EPA MPG.
Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).