2025 head-to-head · Large Car
2025 BMW i7 vs Mercedes-Benz S-Class Plug-in 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 2025 BMW i7 is the cheaper one to run. Driving 15,000 miles a year with 18¢/kWh electricity and $3.95/gal premium gas, it costs about $1,031 a year to fuel (88 MPGe), versus $1,736 for the 2025 Mercedes-Benz S-Class Plug-in Hybrid (63 MPGe + 23 MPG). That's roughly $704 a year, or about $3,521 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 i7
- Mercedes-Benz S-Class Plug-in Hybrid
Side by side
| BMW i7 | Mercedes-Benz S-Class Plug-in Hybrid | |
|---|---|---|
| $1,031 | Your annual fuel cost | $1,736 |
| 88 MPGe | Combined efficiency | 63 MPGe + 23 MPG |
| 85 MPGe | City | 59 MPGe / 20 MPG |
| 93 MPGe | Highway | 70 MPGe / 29 MPG |
| 38.2 kWh | Electricity use (kWh/100 mi) | 53 kWh |
| 314 mi | Driving range | 470 mi |
| — | All-electric range | 48 mi |
| 109 cu ft | Passenger volume | 112 cu ft |
| 11 cu ft | Cargo volume | 8 cu ft |
| 0 g/mi | Tailpipe CO₂ (g/mi) | 106 g/mi |
| 9/10 | EPA fuel economy score | 7/10 |
| 10/10 | EPA greenhouse gas score | 9/10 |
| 12 hrs | Charge time at 240V | 2.8 hrs |
| Electric | Powertrain | Plug-in hybrid |
| Electricity | Fuel | Premium gas + electricity |
| Electric motor (335 kW) | Engine / motor | 3.0L 6-cyl turbo |
| Single-speed | Transmission | 9-speed automatic |
| RWD | 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 i7 vs Mercedes-Benz S-Class Plug-in Hybrid across model years
- BMW i7
- Mercedes-Benz S-Class Plug-in 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
The Mercedes-Benz S-Class Plug-in Hybrid goes farther between stops: about 470 miles on a full tank and charge, compared with 314 miles for the BMW i7.
Per EPA interior volume figures, the BMW i7 has more cargo space (11 vs. 8 cu ft).
Among 25 2025 large cars, the BMW i7 ranks 7th and the Mercedes-Benz S-Class Plug-in Hybrid 12th for lowest fuel cost.
Because the BMW i7 is fully electric, it has no tailpipe emissions and its running cost depends almost entirely on your electricity rate. Cheap overnight home charging widens its advantage over the Mercedes-Benz S-Class Plug-in Hybrid; relying on DC fast chargers can erase it.
Frequently asked questions
Which is more fuel-efficient, the 2025 BMW i7 or the 2025 Mercedes-Benz S-Class Plug-in Hybrid?
Measured by cost to drive, the BMW i7. The BMW i7 is rated 88 MPGe combined and the Mercedes-Benz S-Class Plug-in Hybrid 63 MPGe + 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2025 BMW i7 vs. the Mercedes-Benz S-Class Plug-in Hybrid per year?
At 15,000 miles a year with 18¢/kWh electricity and $3.95/gal premium gas, about $1,031 for the BMW i7 and $1,736 for the Mercedes-Benz S-Class Plug-in Hybrid.
Which has more range?
The Mercedes-Benz S-Class Plug-in Hybrid: about 470 miles versus 314 miles.
Which has more cargo space?
The BMW i7, with 11 cu ft of luggage volume versus 8 cu ft (EPA interior volume index).
BMW i7 vs Mercedes-Benz S-Class Plug-in Hybrid in other years
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