2017 head-to-head · Midsize & Large SUV
2017 Mercedes-Benz GLS-Class vs Porsche Cayenne
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2017 Porsche Cayenne is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,962 a year to fuel (20 MPG), versus $3,118 for the 2017 Mercedes-Benz GLS-Class (19 MPG). That's roughly $156 a year, or about $780 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
- Mercedes-Benz GLS-Class
- Porsche Cayenne
Side by side
| Mercedes-Benz GLS-Class | Porsche Cayenne | |
|---|---|---|
| $3,118 | Your annual fuel cost | $2,962 |
| 19 MPG | Combined efficiency | 20 MPG |
| 17 MPG | City | 17 MPG |
| 22 MPG | Highway | 24 MPG |
| 477 g/mi | Tailpipe CO₂ (g/mi) | 452 g/mi |
| 4/10 | EPA fuel economy score | 4/10 |
| 4/10 | EPA greenhouse gas score | 4/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 3.0L 6-cyl turbo | Engine / motor | 3.6L 6-cyl turbo |
| 9-speed automatic | Transmission | 8-speed automatic |
| 4WD | 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.
Mercedes-Benz GLS-Class vs Porsche Cayenne across model years
- Mercedes-Benz GLS-Class
- Porsche Cayenne
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 44 2017 midsize & large SUVs, the Mercedes-Benz GLS-Class ranks 38th and the Porsche Cayenne 34th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2017 Mercedes-Benz GLS-Class or the 2017 Porsche Cayenne?
Measured by cost to drive, the Porsche Cayenne. The Mercedes-Benz GLS-Class is rated 19 MPG combined and the Porsche Cayenne 20 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2017 Mercedes-Benz GLS-Class vs. the Porsche Cayenne per year?
At 15,000 miles a year with $3.95/gal premium gas, about $3,118 for the Mercedes-Benz GLS-Class and $2,962 for the Porsche Cayenne.
Mercedes-Benz GLS-Class vs Porsche Cayenne in other years
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