Mercedes-Benz AMG GLS63 4matic Plus MPG by year — every rating on record
The Mercedes-Benz AMG GLS63 4matic Plus has a combined EPA fuel economy rating for 6 model years, from 2021 to 2026. Across those years its best rated version returned 17 mpg (2026) and its thirstiest returned 15 mpg (2022). The EPA record holds 6 configurations for this nameplate, most recently a Standard Sport Utility Vehicle 4WD.
Year-by-year EPA ratings
| Model year | Configurations | Best combined | Worst combined | Class rank that year | Drivetrains | Fuel | EPA class |
|---|---|---|---|---|---|---|---|
| 2021 | 1 | 16 mpg | 16 mpg | #86 of 104 (17th pct) | 4-Wheel Drive | Premium | Standard Sport Utility Vehicle 4WD |
| 2022 | 1 | 15 mpg | 15 mpg | #121 of 126 (4th pct) | All-Wheel Drive | Premium | Standard Sport Utility Vehicle 4WD |
| 2023 | 1 | 16 mpg | 16 mpg | #121 of 139 (13th pct) | All-Wheel Drive | Premium | Standard Sport Utility Vehicle 4WD |
| 2024 | 1 | 16 mpg | 16 mpg | #149 of 166 (10th pct) | All-Wheel Drive | Premium | Standard Sport Utility Vehicle 4WD |
| 2025 | 1 | 15 mpg | 15 mpg | #183 of 192 (5th pct) | All-Wheel Drive | Premium | Standard Sport Utility Vehicle 4WD |
| 2026 | 1 | 17 mpg | 17 mpg | #170 of 191 (11th pct) | All-Wheel Drive | Premium | Standard Sport Utility Vehicle 4WD |
Where it has stood in its class
Ranked against every other nameplate the EPA filed under the same class that year. The Mercedes-Benz AMG GLS63 4matic Plus placed highest in 2021 at #86 of 104, and lowest in 2025 at #183 of 192. It spent 0 of its 6 ranked years in the top half of its class.
Every configuration on record
All 6 configurations EPA lists for this nameplate, newest first.
| Year | Configuration | Engine detail | City | Highway | Combined | Gallons/yr | Barrels/yr | EPA fuel cost/yr | CO2 g/mi | GHG |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 4.0L 8-cyl All-Wheel Drive Automatic 9-spd Premium | SIDI; Mild Hybrid, turbocharged, Hybrid, start-stop | 15 | 20 | 17 | 676.5 | 17.5 | $4,550 | 538 | 3/10 |
| 2025 | 4.0L 8-cyl All-Wheel Drive Automatic 9-spd Premium | SIDI; Mild Hybrid, turbocharged, Hybrid, start-stop | 14 | 18 | 15 | 766.7 | 19.8 | $5,150 | 578 | 2/10 |
| 2024 | 4.0L 8-cyl All-Wheel Drive Automatic 9-spd Premium | SIDI; Mild Hybrid, turbocharged, Hybrid, start-stop | 14 | 18 | 16 | 718.8 | 18.6 | $4,850 | 564 | 3/10 |
| 2023 | 4.0L 8-cyl All-Wheel Drive Automatic 9-spd Premium | SIDI; Mild Hybrid, turbocharged, Hybrid, start-stop | 14 | 19 | 16 | 718.8 | 18.6 | $4,850 | 560 | 3/10 |
| 2022 | 4.0L 8-cyl All-Wheel Drive Automatic 9-spd Premium | SIDI; Mild Hybrid, turbocharged, Hybrid, start-stop | 14 | 18 | 15 | 766.7 | 19.8 | $5,150 | 571 | 2/10 |
| 2021 | 4.0L 8-cyl 4-Wheel Drive Automatic 9-spd Premium | SIDI; Mild Hybrid, turbocharged, Hybrid, start-stop | 14 | 18 | 16 | 718.8 | 18.6 | $4,850 | 559 | 2/10 |
How the rating has moved between model years
Comparing the best-rated configuration of each year. 2 of 4 year-over-year steps improved the top rating.
| Change | Best combined | Delta | Gallons a year at the newer rating |
|---|---|---|---|
| 2021 → 2022 | 16 → 15 mpg | -1 mpg | 767 gal |
| 2022 → 2023 | 15 → 16 mpg | +1 mpg | 719 gal |
| 2024 → 2025 | 16 → 15 mpg | -1 mpg | 767 gal |
| 2025 → 2026 | 15 → 17 mpg | +2 mpg | 676 gal |
What AMG GLS63 4matic Plus fuel costs over a year
At the EPA's 11,500 miles a year, the 2026 Mercedes-Benz AMG GLS63 4matic Plus burns 676 to 676 gallons depending on configuration. Below is what that costs at three pump prices, and how much more the thirstiest configuration costs than the most efficient one.
| Pump price | Most efficient | Thirstiest | Spread |
|---|---|---|---|
| $3.00/gal | $2,029 | $2,029 | $0 |
| $3.50/gal | $2,368 | $2,368 | $0 |
| $4.00/gal | $2,706 | $2,706 | $0 |
EPA’s own estimate for the 2026 model year is $4,550 to $4,550 a year in fuel, or $11,500 more than the average new vehicle over five years.
How it compares with other Standard Sport Utility Vehicle 4WD
Across the 317 nameplates EPA classifies as Standard Sport Utility Vehicle 4WD, the median best combined rating is 22 mpg. At 17 mpg the Mercedes-Benz AMG GLS63 4matic Plus is 5 mpg below the median, which is worth about $538 a year at $3.50 a gallon.
- All Standard Sport Utility Vehicle 4WD rankings — every nameplate in the class, best to worst.
Other Mercedes-Benz nameplates
Every Mercedes-Benz model compared → — all nameplates ranked by best combined rating, with what each one costs a year.