2026 Mercedes-Benz G-Class Gas Tank Size and Capacity
Fuel tank capacity
26.4gal · 100 L
The 2026 Mercedes-Benz G-Class has a fuel tank capacity of 26.4 gallons (100 liters) on every trim.
A full tank is good for roughly 422–502 highway miles or 370–449 miles around town, going by the EPA ratings.
26.4 gal · Bigger than 91% of 2026 models we list.
2026 Mercedes-Benz G-Class fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Engine
- no difference
All 2 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| AMG G 63 4dr SUV 4WD 4.0L 8cyl Turbo mild hybrid 9A · 4WD MPG 14 / 16Range 370 / 422 mi | 4.0L 8cyl Turbo mild hybrid 9A | 4WD | 26.4 gal100 L | 14 / 16 | 370 / 422 mi | |
| G 550 4dr SUV 4WD 3.0L 6cyl Twincharger mild hybrid 9A · 4WD MPG 17 / 19Range 449 / 502 mi | 3.0L 6cyl Twincharger mild hybrid 9A | 4WD | 26.4 gal100 L | 17 / 19 | 449 / 502 mi | |
| No trim matches all of these filters. | ||||||
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 2026 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 18 MPG, a full 26.4-gallon tank covers about 475 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 26.4 | 502 | 449 |
| 3/4 | 19.8 | 376 | 337 |
| 1/2 | 13.2 | 251 | 224 |
| 1/4 | 6.6 | 125 | 112 |
| 1/8 | 3.3 | 63 | 56 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 833 gallons, roughly 32 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.
What it costs to fill up a 2026 Mercedes-Benz G-Class
$139.39 to fill the 26.4-gallon tank from empty with premium, at this week's US average of $5.28 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 26.4 gal | Premium | $5.28 | $139.39 | $104.54 |
By region, 26.4-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $130.15 |
| Midwest | $5.37 | $141.77 |
| Gulf CoastLowest | $4.57 | $120.65 |
| Rocky Mountain | $5.12 | $135.17 |
| West Coast | $6.08 | $160.51 |
| CaliforniaHighest | $6.36 | $167.90 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Your own price
- 26.4-gallon tank$139.39
- A year of driving (15,000 mi)$4,400
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
G-Class tank size in other years
The 2026 G-Class uses the same 26.4 gal tank as every G-Class since 2019.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2026 G-Class | 26.4 gal | 502 mi |
| 2025 G-Class | 26.4 gal | 502 mi |
| 2024 G-Class | 26.4 gal | 422 mi |
| 2023 G-Class | 26.4 gal | 422 mi |
| 2022 G-Class | 26.4 gal | 449 mi |
| 2021 G-Class | 26.4 gal | 502 mi |
- 2026
- 2025
- 2024
- 2023
- 2022
- 2021
- 2020
- 2019
- 2018
- 2017
- 2016
- 2015
- 2014
- 2013
- 2012
- 2011
- 2010
- 2009
- 2008
- 2007
- 2006
- 2005
- 2004
- 2003
- 2002
2026 Mercedes-Benz G-Class vs similar 2026 SUVs
The G-Class has the largest tank of the seven 2026 SUVs compared here, 26.4 gallons against 23.8 for the Land Rover Defender.
| 2026 model | Tank | Longest highway range |
|---|---|---|
| Mercedes-Benz G-Class | 26.4 gal | 502 mi |
| Land Rover Defender | 23.8 gal | 547 mi |
| Porsche Cayenne | 18.4–23.7 gal | 545 mi |
| Audi RS Q8 | 22.5 gal | 450 mi |
| BMW X5 M | 21.9 gal | 394 mi |
| Lexus GX | 21.1 gal | 443 mi |
| Genesis GV80 Coupe | 21.1 gal | 464 mi |
Picked by body style and size: other 2026 SUVs within about 5% of the G-Class's length and 15% of its curb weight, one model per brand.
Frequently asked questions
What is the fuel tank capacity of the 2026 Mercedes-Benz G-Class?
The 2026 Mercedes-Benz G-Class holds 26.4 gallons (100 liters) on every trim we list.
How many gallons and liters does the 2026 Mercedes-Benz G-Class gas tank hold?
The 2026 Mercedes-Benz G-Class tank holds 100 liters, or 26.4 gallons in US gallons.
How far can a 2026 Mercedes-Benz G-Class go on a full tank?
About 422–502 miles on the highway and 370–449 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 2026 Mercedes-Benz G-Class go on a quarter tank?
About 125 highway miles or 112 in town from the 26.4-gallon tank, which has roughly 6.6 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2026 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 2026 Mercedes-Benz G-Class?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 26.4-gallon tank from empty costs $139.39. It ranges from $120.65 in the Gulf Coast to $167.90 in California.
How much does a full tank of gas weigh in a 2026 Mercedes-Benz G-Class?
About 164 pounds for the 26.4-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2026 Mercedes-Benz G-Class have a bigger gas tank than the Land Rover Defender?
Yes. The 2026 Mercedes-Benz G-Class holds up to 26.4 gallons; the 2026 Land Rover Defender holds up to 23.8.
Sources
- Tank sizes: manufacturer-rated capacities from US-market specifications, cross-checked against a second spec database. Updated October 2026.
- MPG and range: EPA ratings. Range is tank size times EPA MPG.
- Fuel prices: U.S. Energy Information Administration, week of October 26, 2026.
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.