Does the 2020 Mercedes-Benz GLS need premium gas?
Yes. Premium.
N/Aextra a year
- Premium listed for the GLS 450 4MATIC AWD.
- All 2 trims list premium.
- Required or only recommended: the data does not say.
- 47% of 129 SUVs (2020) list premium.
12,000 miles a year. Gas $3.20. Premium $0.60 more.
| Trim | Engine | Grade | Mpg | Regular, a year | Premium, a year |
|---|---|---|---|---|---|
| GLS 450 4MATIC AWD | 3.0L 6cyl | Premium | 18 to 21 | N/A | N/A |
| GLS 580 4MATIC AWD | 4.0L 8cyl | Premium | 16 to 18 | N/A | N/A |
What this cannot tell you
Check the fuel door or manual before you fill.
Gas prices and the premium gap change by state.
- 2 or more sources
- 1 source
- Model-level, rule or estimate
- Sources disagree