Mercedes-Benz G-Class Engine Specifications
The 2027 Mercedes-Benz G-Class is offered with 3.0L–6.0L engines in 8 and 6 and 12-cylinder form, per EPA fuel-economy records.
Latest model year (2027):
The Mercedes-Benz G-Class is available with 8 4.0L and Automatic 9-spd (4-Wheel Drive).
Mercedes-Benz G-Class Engine Specs — All Years
| Year | Trim | Cylinders | Displ. | Transmission | Drive | Fuel Type | Vehicle Class |
|---|---|---|---|---|---|---|---|
| 2027 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2026Config 1 of 3 | Auto (A2) | — | — | Automatic (A2) | 4-Wheel Drive | Electricity | Standard Sport Utility Vehicle 4WD |
| 2026Config 2 of 3 | Auto 9-spd, 6 cyl, 3.0 L | 6 | 3.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2026Config 3 of 3 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2025Config 1 of 3 | Auto (A2) | — | — | Automatic (A2) | 4-Wheel Drive | Electricity | Standard Sport Utility Vehicle 4WD |
| 2025Config 2 of 3 | Auto 9-spd, 6 cyl, 3.0 L | 6 | 3.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2025Config 3 of 3 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2024Config 1 of 3 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2024Config 2 of 3 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2024Config 3 of 3 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2023Config 1 of 3 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2023Config 2 of 3 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2023Config 3 of 3 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2022Config 1 of 2 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2022Config 2 of 2 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2021Config 1 of 2 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2021Config 2 of 2 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2020Config 1 of 2 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2020Config 2 of 2 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2019Config 1 of 2 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2019Config 2 of 2 | Auto 9-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 9-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2018Config 1 of 4 | Auto 7-spd, 12 cyl, 6.0 L | 12 | 6.0L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2018Config 2 of 4 | Auto 7-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2018Config 3 of 4 | Auto 7-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2018Config 4 of 4 | Auto 7-spd, 8 cyl, 5.5 L | 8 | 5.5L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2017Config 1 of 4 | Auto 7-spd, 12 cyl, 6.0 L | 12 | 6.0L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2017Config 2 of 4 | Auto 7-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2017Config 3 of 4 | Auto 7-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2017Config 4 of 4 | Auto 7-spd, 8 cyl, 5.5 L | 8 | 5.5L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2016Config 1 of 3 | Auto 7-spd, 12 cyl, 6.0 L | 12 | 6.0L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2016Config 2 of 3 | Auto 7-spd, 8 cyl, 4.0 L | 8 | 4.0L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2016Config 3 of 3 | Auto 7-spd, 8 cyl, 5.5 L | 8 | 5.5L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2015Config 1 of 2 | Auto 7-spd, 8 cyl, 5.5 L | 8 | 5.5L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
| 2015Config 2 of 2 | Auto 7-spd, 8 cyl, 5.5 L | 8 | 5.5L | Automatic 7-spd | 4-Wheel Drive | Premium Gasoline | Standard Sport Utility Vehicle 4WD |
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 engine displacement varies
Across 34 configurations recorded for the 2015 through 2027 Mercedes-Benz G-Class, engine displacement runs from 3 litres to 6 litres. The strongest figure belongs to the 2026 Mercedes-Benz G-Class (SIDI; Mild Hybrid) at 3 litres, and the weakest to the 2016 car (Auto 7-spd, 12 cyl, 6.0 L) at 6 litres — a spread of 50%. 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 engine displacement for the 2027 Mercedes-Benz G-Class is 4 litres, against 3.5 litres for the 2026 car — it rose by 0.5 litres. 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 SIDI; Mild Hybrid, SIDI, Auto 9-spd, 8 cyl, 4.0 L, Auto 7-spd, 12 cyl, 6.0 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 engine displacement 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.
Frequently Asked Questions About G-Class Engine Specs
What engine does the Mercedes-Benz G-Class have?
The Mercedes-Benz G-Class is available with 8 cylinder engines ranging up to 4.0L. Transmission and drivetrain options vary by trim. See the full table above.
Is the Mercedes-Benz G-Class available with all-wheel drive?
Check the drive column in the table above to see available drivetrain configurations.
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All Mercedes-Benz G-Class specifications
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