2015 Mercedes-Benz SL EPA Fuel Economy Summary

The 2015 Mercedes-Benz SL delivers an EPA-certified 15–26 MPG combined (13–23 city / 19–32 highway depending on engine and drivetrain) across 10 configurations. Estimated annual fuel costs range from $2,900 to $5,050.

Combined MPG
15–26 MPG
55% city / 45% highway weighted
City MPG
13–23 MPG
Stop-and-go urban cycle
Highway MPG
19–32 MPG
Sustained open-highway test
Annual Fuel Cost
$2,900–5,050
EPA estimate @ 15,000 miles/yr

Official EPA Fuel Economy Ratings by Configuration (10 Variants)

Laboratory certification test values across engine, transmission, and drivetrain permutations

Configuration / Model Powertrain Drivetrain Transmission City Highway Combined Annual Fuel Cost CO2 (g/mi)
SLK250 Premium 1.8L 4-Cyl Gas Rear-Wheel Drive Automatic 7-spd 23 MPG 32 MPG 26 MPG $2,900 —
SLK250 Premium 1.8L 4-Cyl Gas Rear-Wheel Drive Manual 6-spd 22 MPG 32 MPG 26 MPG $2,900 —
SLK350 Premium 3.5L 6-Cyl Gas Rear-Wheel Drive Automatic 7-spd 21 MPG 28 MPG 24 MPG $3,150 —
SLK55 AMG Premium 5.5L 8-Cyl Gas Rear-Wheel Drive Automatic 7-spd 19 MPG 28 MPG 22 MPG $3,450 —
SL63 AMG Premium 5.5L 8-Cyl Gas Rear-Wheel Drive Automatic 7-spd 16 MPG 25 MPG 19 MPG $4,000 —
SL65 AMG Premium 6L 12-Cyl Gas Rear-Wheel Drive Automatic 7-spd 14 MPG 21 MPG 17 MPG $4,450 —
SLS AMG GT Coupe Premium 6.2L 8-Cyl Gas Rear-Wheel Drive Automatic (AM7) 13 MPG 19 MPG 15 MPG $5,050 —
SLS AMG GT Roadster Premium 6.2L 8-Cyl Gas Rear-Wheel Drive Automatic (AM7) 13 MPG 19 MPG 15 MPG $5,050 —
SL400 Premium 3L 6-Cyl Gas Rear-Wheel Drive Automatic 7-spd 20 MPG 27 MPG 23 MPG $3,300 —
SL550 Premium 4.7L 8-Cyl Gas Rear-Wheel Drive Automatic 7-spd 18 MPG 24 MPG 20 MPG $3,800 —
EPA Test Methodology: Fuel economy estimates are determined by vehicle manufacturers in accordance with EPA regulations (40 CFR Part 600) and verified by EPA laboratories. Estimates assume 15,000 miles per year of driving (55% city, 45% highway) at prevailing fuel and electricity prices.

Deterministic Fuel Cost & Consumption Benchmarks

Standardized annual energy consumption and operating cost metrics based on 15,000 annual miles

Fuel Cost per 25 Miles

$3.37–$5.83

Based on $3.50 per gallon regular gasoline

Annual Fuel Consumption

577–1000 Gallons

Estimated annual energy units needed for 15,000 miles

5-Year Fuel Cost vs Avg Vehicle

Official EPA Benchmark

Compared to the average new vehicle over 5 years

Related Official Reports for 2015 Mercedes-Benz SL

Cross-reference safety ratings, owner defect complaints, and recall campaigns

Official US Government Data Provenance

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.

Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.