2027 head-to-head · Midsize & Large SUV
2027 Cadillac Optiq vs Mercedes-Benz EQS
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 2027 Mercedes-Benz EQS is the cheaper one to run. Driving 15,000 miles a year with 18¢/kWh electricity, it costs about $799 a year to fuel (114 MPGe), versus $867 for the 2027 Cadillac Optiq (105 MPGe). That's roughly $67 a year, or about $337 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
- Cadillac Optiq
- Mercedes-Benz EQS
Side by side
| Cadillac Optiq | Mercedes-Benz EQS | |
|---|---|---|
| $867 | Your annual fuel cost | $799 |
| 105 MPGe | Combined efficiency | 114 MPGe |
| 117 MPGe | City | 112 MPGe |
| 93 MPGe | Highway | 116 MPGe |
| 32.1 kWh | Electricity use (kWh/100 mi) | 29.6 kWh |
| 317 mi | Driving range | 443 mi |
| 102 cu ft | Passenger volume | 103 cu ft |
| 26 cu ft | Cargo volume | 35 cu ft |
| 0 g/mi | Tailpipe CO₂ (g/mi) | 0 g/mi |
| 9/10 | EPA fuel economy score | 9/10 |
| 10/10 | EPA greenhouse gas score | 10/10 |
| 9.5 hrs | Charge time at 240V | 12.8 hrs |
| Electric | Powertrain | Electric |
| Electricity | Fuel | Electricity |
| Electric motors (470 kW) | Engine / motor | Electric motors (463 kW) |
| Single-speed | Transmission | 2-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.
Cadillac Optiq vs Mercedes-Benz EQS across model years
- Cadillac Optiq
- Mercedes-Benz EQS
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 EQS goes farther between stops: about 443 miles on a charge, compared with 317 miles for the Cadillac Optiq.
Per EPA interior volume figures, the Mercedes-Benz EQS has more cargo space (35 vs. 26 cu ft).
Among 58 2027 midsize & large SUVs, the Cadillac Optiq ranks 5th and the Mercedes-Benz EQS 3rd for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2027 Cadillac Optiq or the 2027 Mercedes-Benz EQS?
Measured by cost to drive, the Mercedes-Benz EQS. The Cadillac Optiq is rated 105 MPGe combined and the Mercedes-Benz EQS 114 MPGe (EPA, most efficient configuration of each).
How much does it cost to fuel the 2027 Cadillac Optiq vs. the Mercedes-Benz EQS per year?
At 15,000 miles a year with 18¢/kWh electricity, about $867 for the Cadillac Optiq and $799 for the Mercedes-Benz EQS.
Which has more range?
The Mercedes-Benz EQS: about 443 miles versus 317 miles.
Which has more cargo space?
The Mercedes-Benz EQS, with 35 cu ft of luggage volume versus 26 cu ft (EPA interior volume index).
Cadillac Optiq vs Mercedes-Benz EQS in other years
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