Mercedes-Benz C300: MPG and fuel economy by year
The EPA has rated the Mercedes-Benz C300 across 16 model years, from the 2008 Mercedes-Benz C300 through the 2026 Mercedes-Benz C300. The most recent 2026 Mercedes-Benz C300 returns 29 combined MPG. The most efficient model year was the 2024 Mercedes-Benz C300 at 30 MPG.
Pick a year below to open the full Mercedes-Benz C300 page for that model year. Each year page covers combined, city, and highway MPG, the trim variants the EPA rates separately, the annual fuel cost across three driving patterns, and a year-over-year comparison so you can see whether the car has improved.
Fuel economy by model year
Combined MPG, city MPG, highway MPG, and the EPA's estimated annual fuel cost for every model year of the Mercedes-Benz C300. Click any year to see the full breakdown for that model year, including trim variants, the drivetrain, and a comparison against other vehicles in its segment.
| Year | Model | Combined MPG | City | Highway | Annual fuel cost |
|---|---|---|---|---|---|
| 2026 | 2026 Mercedes-Benz C300 | 29 MPG | 25 MPG | 35 MPG | $2,400 |
| 2025 | 2025 Mercedes-Benz C300 | 29 MPG | 25 MPG | 35 MPG | $2,400 |
| 2024 | 2024 Mercedes-Benz C300 | 30 MPG | 26 MPG | 36 MPG | $2,300 |
| 2023 | 2023 Mercedes-Benz C300 | 29 MPG | 25 MPG | 36 MPG | $2,400 |
| 2022 | 2022 Mercedes-Benz C300 | 29 MPG | 25 MPG | 35 MPG | $2,400 |
| 2021 | 2021 Mercedes-Benz C300 | 27 MPG | 23 MPG | 35 MPG | $2,550 |
| 2020 | 2020 Mercedes-Benz C300 | 28 MPG | 24 MPG | 35 MPG | $2,450 |
| 2019 | 2019 Mercedes-Benz C300 | 27 MPG | 23 MPG | 34 MPG | $2,550 |
| 2018 | 2018 Mercedes-Benz C300 | 27 MPG | 24 MPG | 33 MPG | $2,550 |
| 2017 | 2017 Mercedes-Benz C300 | 28 MPG | 24 MPG | 34 MPG | $2,450 |
| 2016 | 2016 Mercedes-Benz C300 | 28 MPG | 25 MPG | 34 MPG | $2,450 |
| 2015 | 2015 Mercedes-Benz C300 | 28 MPG | 25 MPG | 33 MPG | $2,450 |
| 2011 | 2011 Mercedes-Benz C300 | 21 MPG | 18 MPG | 25 MPG | $3,300 |
| 2010 | 2010 Mercedes-Benz C300 | 21 MPG | 18 MPG | 26 MPG | $3,300 |
| 2009 | 2009 Mercedes-Benz C300 | 21 MPG | 18 MPG | 25 MPG | $3,300 |
| 2008 | 2008 Mercedes-Benz C300 | 21 MPG | 18 MPG | 26 MPG | $3,300 |
How the Mercedes-Benz C300 compares against the Compact Cars class
Buyers usually compare the Mercedes-Benz C300 against other cars in the same EPA class. The list below shows the most efficient cars in the Compact Cars class for the 2026 model year, the latest year on this page. Each link opens the full page for that car.
Source: U.S. EPA fuel economy dataset. Annual fuel cost assumes 15,000 miles of driving per year and a 55% city, 45% highway split.