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Mercedes-Benz GLS-Class Annual Fuel Cost

Running a 2026 Mercedes-Benz GLS-Class costs about $3,600 per year in fuel, based on 15,000 miles of driving at average U.S. fuel prices.

Latest model year (2026):

The Mercedes-Benz GLS-Class costs an estimated $3,600/year in fuel (428 g CO₂/mi).

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

Mercedes-Benz GLS-Class Fuel Cost — All Years

YearTrimEngineFuelMPG Comb.Annual CostCO₂ (g/mi)GHG Score
2026Config 1 of 4Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline21$3,6004284
2026Config 2 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline16$4,7505393
2026Config 3 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline15$5,0505852
2026Config 4 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline17$4,4505383
2025Config 1 of 4Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline21$3,6004284
2025Config 2 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline15$5,0505782
2025Config 3 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline16$4,7505483
2025Config 4 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline15$5,0505882
2024Config 1 of 4Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline21$3,6004284
2024Config 2 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline16$4,7505543
2024Config 3 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline16$4,7505643
2024Config 4 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline16$4,7505743
2023Config 1 of 4Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline20$3,8004334
2023Config 2 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline16$4,7505603
2023Config 3 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline17$4,4505283
2023Config 4 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline18$4,2004994
2022Config 1 of 4Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline20$3,8004334
2022Config 2 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline15$5,0505712
2022Config 3 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline18$4,2004983
2022Config 4 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline17$4,4505333
2021Config 1 of 4Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline21$3,6004144
2021Config 2 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline18$4,2004913
2021Config 3 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline16$4,7505592
2021Config 4 of 4Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline16$4,7505392
2020Config 1 of 2Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline21$3,6004294
2020Config 2 of 2Auto 9-spd, 8 cyl, 4.0 L8 4.0LPremium Gasoline18$4,2004873
2019Config 1 of 3Auto 7-spd, 8 cyl, 5.5 L8 5.5LPremium Gasoline15$5,0506012
2019Config 2 of 3Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline18$4,2004883
2019Config 3 of 3Auto 9-spd, 8 cyl, 4.7 L8 4.7LPremium Gasoline16$4,7505722
2018Config 1 of 3Auto 7-spd, 8 cyl, 5.5 L8 5.5LPremium Gasoline15$5,0505912
2018Config 2 of 3Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline19$4,0004773
2018Config 3 of 3Auto 9-spd, 8 cyl, 4.7 L8 4.7LPremium Gasoline16$4,7505562
2017Config 1 of 3Auto 7-spd, 8 cyl, 5.5 L8 5.5LPremium Gasoline14$5,4506151
2017Config 2 of 3Auto 9-spd, 6 cyl, 3.0 L6 3.0LPremium Gasoline19$4,0004774
2017Config 3 of 3Auto 9-spd, 8 cyl, 4.7 L8 4.7LPremium Gasoline16$4,7505622

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 GLS-Class data analysis

How Mercedes-Benz GLS-Class estimated annual fuel cost varies

Across 35 configurations recorded for the 2017 through 2026 Mercedes-Benz GLS-Class, estimated annual fuel cost runs from $3,600 to $5,450. The strongest figure belongs to the 2026 Mercedes-Benz GLS-Class (Auto 9-spd, 6 cyl, 3.0 L) at $3,600, and the weakest to the 2017 car (Auto 7-spd, 8 cyl, 5.5 L) at $5,450 — a spread of 34%. 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 GLS-Class would be misleading.

What changed for 2026

Average estimated annual fuel cost for the 2026 Mercedes-Benz GLS-Class is $4,463, against $4,613 for the 2025 car — it fell by $150. That is a real improvement, and it is the kind of change worth paying the newer-year premium for if this figure drives your decision.

How to read this Mercedes-Benz GLS-Class data

This page lists every 2017 through 2026 Mercedes-Benz GLS-Class record we hold for this measurement — 35 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 GLS-Class numbers

The 2017 through 2026 Mercedes-Benz GLS-Class entries here cover the variants Auto 9-spd, 6 cyl, 3.0 L, Auto 9-spd, 8 cyl, 4.0 L, Auto 7-spd, 8 cyl, 5.5 L and Auto 9-spd, 8 cyl, 4.7 L. 2026 is the busiest model year in the record with 4 separate measured configurations, which is why a single quoted estimated annual fuel cost 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 GLS-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 GLS-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.

Frequently Asked Questions About GLS-Class Fuel Cost

How much does it cost to fuel the Mercedes-Benz GLS-Class?

The estimated annual fuel cost for the Mercedes-Benz GLS-Class is $3,600 per year, based on 15,000 miles of driving and average fuel prices. Costs vary by trim and engine.

How much CO₂ does the Mercedes-Benz GLS-Class produce?

The Mercedes-Benz GLS-Class produces approximately 428 grams of CO₂ per mile. Lower numbers mean fewer emissions. See the table for per-trim details.

View full Mercedes-Benz GLS-Class specs

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