2026 head-to-head · Small SUV
2026 Cadillac XT5 vs Mercedes-Benz GLB-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.
The 2026 Mercedes-Benz GLB-Class Hybrid is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas and $3.95/gal premium gas, it costs about $2,116 a year to fuel (28 MPG), versus $2,214 for the 2026 Cadillac XT5 (21 MPG). That's roughly $98 a year, or about $491 over five years.
Your numbers
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Fuel cost over 10 years
- Cadillac XT5
- Mercedes-Benz GLB-Class Hybrid
Side by side
| Cadillac XT5 | Mercedes-Benz GLB-Class Hybrid | |
|---|---|---|
| $2,214 | Your annual fuel cost | $2,116 |
| 21 MPG | Combined efficiency | 28 MPG |
| 19 MPG | City | 25 MPG |
| 26 MPG | Highway | 33 MPG |
| 423 g/mi | Tailpipe CO₂ (g/mi) | 311 g/mi |
| 4/10 | EPA fuel economy score | 5/10 |
| 4/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Hybrid |
| Regular gasoline | Fuel | Premium gasoline |
| 3.6L 6-cyl | Engine / motor | 2.0L 4-cyl turbo |
| 9-speed automatic | Transmission | 8-speed dual-clutch |
| FWD | Drivetrain | FWD |
✓ 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.
Cadillac XT5 vs Mercedes-Benz GLB-Class Hybrid across model years
- Cadillac XT5
- Mercedes-Benz GLB-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 114 2026 small SUVs, the Cadillac XT5 ranks 97th and the Mercedes-Benz GLB-Class Hybrid 91st for lowest fuel cost.
The powertrains differ: the Cadillac XT5 is a conventional gas model, while the Mercedes-Benz GLB-Class Hybrid is a full hybrid.
Frequently asked questions
Which is more fuel-efficient, the 2026 Cadillac XT5 or the 2026 Mercedes-Benz GLB-Class Hybrid?
Measured by cost to drive, the Mercedes-Benz GLB-Class Hybrid. The Cadillac XT5 is rated 21 MPG combined and the Mercedes-Benz GLB-Class Hybrid 28 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 Cadillac XT5 vs. the Mercedes-Benz GLB-Class Hybrid per year?
At 15,000 miles a year with $3.10/gal regular gas and $3.95/gal premium gas, about $2,214 for the Cadillac XT5 and $2,116 for the Mercedes-Benz GLB-Class Hybrid.
Cadillac XT5 vs Mercedes-Benz GLB-Class Hybrid in other years
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