2020 Mercedes-Benz GLS450 4matic
3.0L 6-cyl · 9-speed automatic · 4WD
Official EPA record #41788 from FuelEconomy.gov · data 2026-07-26 · every assumption below is yours to edit. How this is computed
Per month
$240.62
Per year
$2,887
Per mile
24.1¢/mi
5-year total
$14,435
Your own average replaces the EPA laboratory values — never averaged together with them — and the driving-mix setting stops applying, because a figure you measured already contains your own mix.
Notes & official EPA estimate
Official FuelEconomy.gov estimate: $3,650/year — assumes 15,000 miles/year and EPA price assumptions. The figures above use your inputs instead.
Official EPA efficiency
| Measure | Value |
|---|---|
| City MPG | 19 |
| Highway MPG | 23 |
| Combined MPG | 21 |
Official EPA estimates
| Estimate | Value |
|---|---|
| Official annual fuel cost (15,000 mi/yr) | $3,650/yr |
| Tailpipe CO₂ | 429 g/mi |
| EPA greenhouse gas score | 4/10 |
| EPA smog rating (Federal Tier 3 Bin 50) | 6/10 |
Source: U.S. EPA / DOE FuelEconomy.gov, vehicle record #41788 (record updated 2020-02-05). Snapshot processed 2026-07-26; page data last changed 2020-02-05.
Related configurations
Same year, same family
Adjacent model years
- AMG GLS63 4matic Plus · 4.0L 8-cyl · 9-speed automatic · 4WD2021
- GLS450 4matic · 3.0L 6-cyl · 9-speed automatic · 4WD2021
- GLS600 4matic Maybach · 4.0L 8-cyl · 9-speed automatic · 4WD2021
- GLS580 4matic · 4.0L 8-cyl · 9-speed automatic · 4WD2021
- GLS450 4matic · 3.0L 6-cyl · 9-speed automatic · 4WD2019
- GLS550 4matic · 4.7L 8-cyl · 9-speed automatic · 4WD2019
- AMG GLS63 · 5.5L 8-cyl · 7-speed automatic · 4WD2019