2015 Mercedes-Benz SL400 MPG and Fuel Economy
On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 2015 Mercedes-Benz SL400.
The 2015 Mercedes-Benz SL400 runs on premium gasoline and is in the Two Seaters car class.
Whether you are considering a purchase of the car, or just wanting to find out how economical and environmentally friendly (or un-friendly) your 2015 Mercedes-Benz SL400 is, we have the information you need.
🛣 How Many Miles per Gallon (MPG) Does a 2015 Mercedes-Benz SL400 Get?
First off, the most commonly asked question. A 2015 Mercedes-Benz SL400 gets up to 20 miles per gallon in the city, and 27 miles per gallon on the highway.
The combined average MPG for the 2015 Mercedes-Benz SL400 is 23 miles per gallon.
💵 What is the Average Yearly Fuel Cost for a 2015 Mercedes-Benz SL400?
The estimated fuel costs for the 2015 Mercedes-Benz SL400 is $3,200 per year.
That value has been estimated by government regulators based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.
If you were to compare a 2015 Mercedes-Benz SL400 to an average vehicle over 5 years, you will spend $4,500 more on fuel.
🛢 How Many Barrels of Petroleum Does a 2015 Mercedes-Benz SL400 Consume?
The 2015 Mercedes-Benz SL400 will consume roughly 13 barrels of petroleum per year, using the standard estimate of 15,000 miles per year.
The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.
💨 How Many Grams of CO2 Does a 2015 Mercedes-Benz SL400 Emit?
For every mile driven, the 2015 Mercedes-Benz SL400 will emit 393 grams of CO2, which is about 5,895,000 grams of CO2 per year.
🌳 To help you understand the impact of this, a normal tree will absorb around 21,000 grams of CO2 per year. This means that roughly 201 trees would be needed to offset emissions from the 2015 Mercedes-Benz SL400.
Overview
The table below covers all of the miles per gallon, engine specifications, and emission details we have for the 2015 Mercedes-Benz SL400.
| City MPG | 20 |
|---|---|
| Highway MPG | 27 |
| Combined MPG | 23 |
| Save/Spend vs Average Car | Spend $4,500 |
| Fuel Cost | $3,200 |
| Fuel Type 1 | Premium |
| Barrels of Petroleum | 13 |
| Grams of CO2 | 5,895,000 |
| Trees Needed to Offset | 281 |
| Drive | Rear-Wheel Drive |
| Cylinders | 6 |
| Displacement | 3 |
| Transmission | Automatic 7-spd |
| Vehicle Class | Two Seaters |
| Start/Stop? | Yes |
| Supercharged? | No |
| Turbocharged? | Yes |
Related Mercedes-Benz Models from 2015
If you're interested in other Mercedes-Benz models from 2015, you can find them in the table below. You can click the model link to find miles per gallon and emission information for that model.
| Model | Combined MPG |
|---|---|
| AMG C63 | 20 |
| AMG C63 S | 20 |
| B-Class Electric Drive | 84 |
| C250 Coupe | 25 |
| C300 | 28 |
| C300 4matic | 27 |
| C350 4matic Coupe | 22 |
| C350 Coupe | 23 |
| C400 4matic | 24 |
| C63 AMG Coupe | 15 |
| CLA250 | 30 |
| CLA250 4matic | 27 |
| CLA250 4matic | 27 |
| CLA45 AMG 4matic | 26 |
| CLS400 | 24 |
| CLS400 4matic | 22 |
| CLS550 | 20 |
| CLS550 4matic | 19 |
| CLS63 AMG S 4matic | 18 |
| E350 | 23 |
Link To or Reference This Page
If you use this page in your research, please reference MPG Buddy as the source.
<a href="https://mpgbuddy.com/cars/mercedes-benz/sl400/2015">2015 Mercedes-Benz SL400 MPG and Fuel Economy</a>
"2015 Mercedes-Benz SL400 MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/mercedes-benz/sl400/2015.
"2015 Mercedes-Benz SL400 MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/mercedes-benz/sl400/2015. Accessed January 3, 2026.
2015 Mercedes-Benz SL400 MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/mercedes-benz/sl400/2015.