The 2015 Mercedes-Benz S-Class delivers an EPA-certified 16–20 MPG combined across 7 configurations. Estimated annual fuel costs range from $2,900 to $4,750.
Factual efficiency differences across gasoline, hybrid, plug-in hybrid, and electric variants
Annual Fuel Cost: $3,800–$4,750.
Gasoline Combined: 26 MPG • Annual Cost: $2,900.
Laboratory certification test values across engine, transmission, and drivetrain permutations
| Configuration / Model | Powertrain | Drivetrain | Transmission | City | Highway | Combined | EV Range | Annual Fuel Cost | CO2 (g/mi) |
|---|---|---|---|---|---|---|---|---|---|
| S550e Premium and Electricity | 3L Plug-in Hybrid | Rear-Wheel Drive | Automatic 7-spd | 54 MPGe (24 MPG) | 63 MPGe (30 MPG) | 58 MPGe (26 MPG) | 14 mi | $2,900 | — |
| S550 Premium | 4.7L 8-Cyl Gas | Rear-Wheel Drive | Automatic 7-spd | 17 MPG | 26 MPG | 20 MPG | — | $3,800 | — |
| CLS550 Premium | 4.7L 8-Cyl Gas | Rear-Wheel Drive | Automatic 9-spd | 18 MPG | 26 MPG | 20 MPG | — | $3,800 | — |
| S550 4matic Premium | 4.7L 8-Cyl Gas | 4-Wheel Drive | Automatic 7-spd | 16 MPG | 26 MPG | 19 MPG | — | $4,000 | — |
| S550 4matic Coupe Premium | 4.7L 8-Cyl Gas | 4-Wheel Drive | Automatic 7-spd | 16 MPG | 24 MPG | 19 MPG | — | $4,000 | — |
| CLS550 4matic Premium | 4.7L 8-Cyl Gas | 4-Wheel Drive | Automatic 7-spd | 17 MPG | 24 MPG | 19 MPG | — | $4,000 | — |
| S600 Premium | 6L 12-Cyl Gas | Rear-Wheel Drive | Automatic 7-spd | 13 MPG | 21 MPG | 16 MPG | — | $4,750 | — |
Standardized annual energy consumption and operating cost metrics based on 15,000 annual miles
Based on $3.50 per gallon regular gasoline
Estimated annual energy units needed for 15,000 miles
Compared to the average new vehicle over 5 years
Cross-reference safety ratings, owner defect complaints, and recall campaigns
Vehicle summary, specifications, and primary KPI metrics.
NHTSA 5-Star NCAP crash tests, rollover risk, and active driver assistance.
NHTSA consumer defect complaint filings by affected component.
Official safety recall notices, defects, and free repair instructions.
Direct, deterministic answers synthesized from verified United States government databases for the 2015 Mercedes-Benz S-Class
The 2015 Mercedes-Benz S-Class achieves an EPA-certified rating of 16 to 20 MPG combined across 7 certified configuration(s).
City ratings range from 13 to 20 MPG, and highway ratings range from 16 to 26 MPG.
The 2015 Mercedes-Benz S-Class plug-in hybrid (PHEV) delivers up to 0 miles of all-electric driving range before transitioning to hybrid gasoline operation.
In electric mode, efficiency is rated at 26 MPGe, switching to 0 MPG combined on gasoline.
Using AutoUtility's standardized operating cost model, estimated annual fueling and energy costs range between $2,900 and $4,750 for the 2015 Mercedes-Benz S-Class.
Calculated under AutoUtility's standardized methodology (15,000 miles per year, 55% city / 45% highway driving, $3.50/gallon regular gasoline, $0.16/kWh electricity) using official EPA dynamometer consumption ratings.
Fuel economy ratings, electric range figures, and energy cost estimates on this page are retrieved directly from the United States Environmental Protection Agency (EPA) and U.S. Department of Energy (FuelEconomy.gov) certified vehicle database under 40 CFR Part 600.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.