2027 head-to-head · Midsize & Large SUV
2027 BMW X6 Hybrid vs Mercedes-Benz GLS-Class Hybrid
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
AWD · 3.0L 6-cyl turbo · 9-speed automatic · 21 MPG
The 2027 BMW X6 Hybrid is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,576 a year to fuel (23 MPG), versus $2,821 for the 2027 Mercedes-Benz GLS-Class Hybrid (21 MPG). That's roughly $245 a year, or about $1,227 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- BMW X6 Hybrid
- Mercedes-Benz GLS-Class Hybrid
Side by side
| BMW X6 Hybrid | Mercedes-Benz GLS-Class Hybrid | |
|---|---|---|
| $2,576 | Your annual fuel cost | $2,821 |
| 23 MPG | Combined efficiency | 21 MPG |
| 21 MPG | City | 19 MPG |
| 26 MPG | Highway | 24 MPG |
| 379 g/mi | Tailpipe CO₂ (g/mi) | 424 g/mi |
| 5/10 | EPA fuel economy score | 4/10 |
| 5/10 | EPA greenhouse gas score | 4/10 |
| Hybrid | Powertrain | Hybrid |
| Premium gasoline | Fuel | Premium gasoline |
| 3.0L 6-cyl turbo | Engine / motor | 3.0L 6-cyl turbo |
| 8-speed automatic | Transmission | 9-speed automatic |
| AWD | Drivetrain | AWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
BMW X6 Hybrid vs Mercedes-Benz GLS-Class Hybrid across model years
- BMW X6 Hybrid
- Mercedes-Benz GLS-Class Hybrid
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Among 58 2027 midsize & large SUVs, the BMW X6 Hybrid ranks 38th and the Mercedes-Benz GLS-Class Hybrid 48th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2027 BMW X6 Hybrid or the 2027 Mercedes-Benz GLS-Class Hybrid?
Measured by cost to drive, the BMW X6 Hybrid. The BMW X6 Hybrid is rated 23 MPG combined and the Mercedes-Benz GLS-Class Hybrid 21 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2027 BMW X6 Hybrid vs. the Mercedes-Benz GLS-Class Hybrid per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,576 for the BMW X6 Hybrid and $2,821 for the Mercedes-Benz GLS-Class Hybrid.
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