Mercedes-Benz EQB vs Polestar 3: Specs Compared
Also searched as Polestar 3 vs Mercedes-Benz EQB specs — both orientations show this same side-by-side comparison.
The Mercedes-Benz EQB is the more efficient of the two: it reaches 107 mpg combined versus 97 mpg for the Polestar 3, a 10 mpg advantage and costs about $100 less per year to fuel.
Across 4 measured categories, the Mercedes-Benz EQB leads in 4. Figures are EPA test data, not manufacturer claims.
2022–2025
Mercedes-Benz EQB
Small Sport Utility Vehicle 4WD · 8 configurations
2025–2026
Polestar 3
Standard Sport Utility Vehicle 4WD · 12 configurations
Head-to-head specifications
| Metric | Mercedes-Benz EQB | Polestar 3 |
|---|---|---|
| Best combined MPG | 107 mpg ✓ | 97 mpg |
| Best city MPG | 114 mpg ✓ | 105 mpg |
| Best highway MPG | 100 mpg ✓ | 89 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $700 ✓ | $800 |
| Lowest CO2 output | Not available | Not available |
| Engines offered | Not available | Not available |
| Transmissions | Automatic (A1) | Automatic (A1) |
| Drivetrains | Front-Wheel Drive, All-Wheel Drive | Rear-Wheel Drive, All-Wheel Drive |
| Fuel types | Electricity | Electricity |
| EPA class | Small Sport Utility Vehicle 4WD | Standard Sport Utility Vehicle 4WD |
| Years covered | 2022–2025 | 2025–2026 |
| Configurations on record | 8 | 12 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Mercedes-Benz EQB vs Polestar 3: what the numbers mean
Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Mercedes-Benz EQB burns about $700 of fuel annually against $800 for the Polestar 3. That $100 yearly gap compounds to roughly $500 over five years and $800 over eight — often more than the price difference between two trims of the same vehicle, and the single largest running-cost line item separating these two.
City and highway economy: the Mercedes-Benz EQB leads in both cycles — 114 mpg city and 100 mpg highway against 105 and 89 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.
Drivetrain and class: the Mercedes-Benz EQB is offered with Front-Wheel Drive, All-Wheel Drive, the Polestar 3 with Rear-Wheel Drive, All-Wheel Drive. All-wheel drive typically costs one to two mpg combined against the same vehicle in front- or rear-wheel drive, which is worth remembering when the gap between these two is small. The EPA classes them as Small Sport Utility Vehicle 4WD and Standard Sport Utility Vehicle 4WD respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.
EQB vs 3: common questions
Which is better on gas, the Mercedes-Benz EQB or the Polestar 3?
The Mercedes-Benz EQB is the more efficient of the two: it reaches 107 mpg combined versus 97 mpg for the Polestar 3, a 10 mpg advantage and costs about $100 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Mercedes-Benz EQB runs about $700 a year in fuel at its most efficient configuration, versus about $800 for the Polestar 3 — a difference of roughly $100 per year.
What engines do the EQB and 3 offer?
Mercedes-Benz EQB: no engine data on record. Polestar 3: no engine data on record.
Are they in the same vehicle class?
The EPA classifies the Mercedes-Benz EQB as Small Sport Utility Vehicle 4WD and the Polestar 3 as Standard Sport Utility Vehicle 4WD, so they aren't a like-for-like match on size.
More EQB comparisons
More 3 comparisons
Comparison id: mercedes-benz-eqb-vs-polestar-3