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Mercedes-Benz G-Class Fuel Economy (MPG)

What is the real-world gas mileage of a 2027 Mercedes-Benz G-Class?

The 2027 Mercedes-Benz G-Class gets up to 62 MPG combined (68 city / 56 highway) in EPA testing.

Latest model year (2027):

The Mercedes-Benz G-Class gets up to 15 MPG combined (14 city / 16 highway) in the Auto 9-spd, 8 cyl, 4.0 L trim.

Verifiedfueleconomy.gov · Verified August 11, 2026
OverviewMPGEngine SpecsFuel CostTransmissionDrivetrainVehicle ClassMaintenanceDimensionsCurb WeightEV Range

Mercedes-Benz G-Class MPG — All Years

YearTrimEngineFuelCity (MPG)Hwy (MPG)Combined (MPG)
2027Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline141615
2026Config 1 of 3Auto (A2)—Electricity685662
2026Config 2 of 3Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline171918
2026Config 3 of 3Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline141615
2025Config 1 of 3Auto (A2)—Electricity685662
2025Config 2 of 3Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline171918
2025Config 3 of 3Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline141615
2024Config 1 of 3Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131614
2024Config 2 of 3Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline101211
2024Config 3 of 3Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131614
2023Config 1 of 3Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131614
2023Config 2 of 3Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131614
2023Config 3 of 3Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline101211
2022Config 1 of 2Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131614
2022Config 2 of 2Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline141716
2021Config 1 of 2Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131614
2021Config 2 of 2Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline171918
2020Config 1 of 2Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131714
2020Config 2 of 2Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131514
2019Config 1 of 2Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131714
2019Config 2 of 2Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131514
2018Config 1 of 4Auto 7-spd, 12 cyl, 6.0 L12 6.0LPremium Gasoline111312
2018Config 2 of 4Auto 7-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131413
2018Config 3 of 4Auto 7-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline111111
2018Config 4 of 4Auto 7-spd, 8 cyl, 5.5 L8 5.5LPremium Gasoline121513
2017Config 1 of 4Auto 7-spd, 12 cyl, 6.0 L12 6.0LPremium Gasoline111312
2017Config 2 of 4Auto 7-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131413
2017Config 3 of 4Auto 7-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline111111
2017Config 4 of 4Auto 7-spd, 8 cyl, 5.5 L8 5.5LPremium Gasoline121413
2016Config 1 of 3Auto 7-spd, 12 cyl, 6.0 L12 6.0LPremium Gasoline111312
2016Config 2 of 3Auto 7-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline131413
2016Config 3 of 3Auto 7-spd, 8 cyl, 5.5 L8 5.5LPremium Gasoline121413
2015Config 1 of 2Auto 7-spd, 8 cyl, 5.5 L8 5.5LPremium Gasoline121413
2015Config 2 of 2Auto 7-spd, 8 cyl, 5.5 L8 5.5LPremium Gasoline121513

Data sourced from fueleconomy.gov (U.S. Department of Energy). MPG figures are EPA-tested. Fuel costs are estimates based on average fuel prices and 15,000 miles/year.

Mercedes-Benz G-Class data analysis

How Mercedes-Benz G-Class combined fuel economy varies

Across 34 configurations recorded for the 2015 through 2027 Mercedes-Benz G-Class, combined fuel economy runs from 11 MPG to 62 MPG. The strongest figure belongs to the 2025 Mercedes-Benz G-Class (Auto (A2)) at 62 MPG, and the weakest to the 2024 car (Auto 9-spd, 8 cyl, 4.0 L) at 11 MPG — a spread of 464%. A gap that wide means the model year and configuration you buy matter more than the nameplate does: quoting a single number for the Mercedes-Benz G-Class would be misleading.

What changed for 2027

Average combined fuel economy for the 2027 Mercedes-Benz G-Class is 15 MPG, against 31.7 MPG for the 2026 car — it fell by 16.7 MPG. Buyers who care most about this figure should look at the earlier model years in the table above before assuming newest is best.

How to read this Mercedes-Benz G-Class data

This page lists every 2015 through 2027 Mercedes-Benz G-Class record we hold for this measurement — 34 rows in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.

Configurations behind these Mercedes-Benz G-Class numbers

The 2015 through 2027 Mercedes-Benz G-Class entries here cover the variants Auto 9-spd, 8 cyl, 4.0 L, Auto (A2), Auto 9-spd, 6 cyl, 3.0 L, Auto 7-spd, 12 cyl, 6.0 L, Auto 7-spd, 8 cyl, 4.0 L and Auto 7-spd, 8 cyl, 5.5 L. 2018 is the busiest model year in the record with 4 separate measured configurations, which is why a single quoted combined fuel economy figure for that year is rarely the one that matches the car in front of you. Match the row to the exact drivetrain, body style and engine on the window sticker or VIN before relying on the number, and use the comparison links below to see how those same configurations line up against rival models.

Where these Mercedes-Benz G-Class figures come from

Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The Mercedes-Benz G-Class record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.

Official Factory Specs vs. AutoSpecData Expert Benchmarks

The EPA highway loop never holds interstate speed. Here is what the same engine does when you sit on the cruise control.

Cruise speedEPA highway specAutoSpecData adjusted MPGFuel you lose
60 mph56 MPG56 MPG0%
65 mph56 MPG51.1 MPG9%
70 mph56 MPG46.7 MPG17%
75 mph56 MPG42.8 MPG24%
80 mph56 MPG39.2 MPG30%

Our Real-World Speed MPG Adjuster re-scales the Mercedes-Benz G-Class EPA highway result with a quadratic drag term (mpg = hwy ÷ (1 + k·(v² − 60²)/60²), k = 0.55 for trucks, SUVs and vans, 0.42 for cars). Wind, roof racks, and a heavy right foot make it worse, never better.

Frequently Asked Questions About G-Class MPG

What is the MPG of the Mercedes-Benz G-Class?

The Mercedes-Benz G-Class gets up to 62 MPG combined (68 city / 56 highway) in the 2027 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Mercedes-Benz G-Class trim has the best fuel economy?

The Auto (A2) trim offers the best combined fuel economy at 62 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.

View full Mercedes-Benz G-Class specs

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