Mercedes-Benz AMG C43 4matic Convertible
22 MPG The 2023 Mercedes-Benz AMG C43 4matic Convertible is EPA-rated at 22 MPG combined (18 city / 28 highway). Over 15,000 miles a year that is about 682 gallons, $2182 a year in fuel, or $0.145 per mile at $3.20/gal.
Across its full 2017–2023 run it averages 21.7 MPG, essentially flat across 7 model years.
Running cost at different fuel prices and mileages
The figure everyone actually wants, and the one the EPA does not publish — because it depends on a fuel price no agency will commit to.
| Fuel price | Per mile | 10,000 mi/yr | 15,000 mi/yr | 20,000 mi/yr |
|---|---|---|---|---|
| $2.50/gal | $0.114 | $1136 | $1705 | $2273 |
| $3.00/gal | $0.136 | $1364 | $2045 | $2727 |
| $3.20/gal | $0.145 | $1455 | $2182 | $2909 |
| $3.50/gal | $0.159 | $1591 | $2386 | $3182 |
| $4.00/gal | $0.182 | $1818 | $2727 | $3636 |
| $4.50/gal | $0.205 | $2045 | $3068 | $4091 |
| $5.00/gal | $0.227 | $2273 | $3409 | $4545 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2023 | 22 MPG | 18 | 28 | $3500 | 412 | 1 |
| 2022 | 22 MPG | 19 | 28 | $3500 | 402 | 1 |
| 2021 | 22 MPG | 19 | 27 | $3500 | 404 | 1 |
| 2020 | 21 MPG | 18 | 25 | $3650 | 423 | 1 |
| 2019 | 21 MPG | 18 | 25 | $3650 | 423 | 1 |
| 2018 | 22 MPG | 19 | 26 | $3500 | 405 | 1 |
| 2017 | 22 MPG | 19 | 26 | $3500 | 410 | 1 |
Where a model year offered several engines or drivetrains, the figure is the average across all EPA-tested trims that year — the trim count is shown so you can see how much averaging is involved.
How it compares in its class
Among the 229 subcompact cars models tracked here, the Mercedes-Benz AMG C43 4matic Convertible ranks 119 on current figures, against a class average of 24.2 MPG.
Closest more-efficient alternatives in the same class: Ford Probe (22.3), BMW M240i Convertible (22.5), Mazda MX-6 (22.5), Saab 9-3 Convertible (22.5), Mitsubishi Cordia (22.7).
Tailpipe CO₂ is rated at 412 grams per mile, which works out to roughly 6.2 tonnes a year at 15,000 miles.
Questions
What MPG does the Mercedes-Benz AMG C43 4matic Convertible get?
The 2023 Mercedes-Benz AMG C43 4matic Convertible is rated at 22 MPG combined by the EPA — 18 city and 28 highway. Across all 7 model years in the database it averages 21.7 MPG, ranging from 21 to 22 depending on year and trim.
How much does a Mercedes-Benz AMG C43 4matic Convertible cost in fuel per year?
At 22 MPG and 15,000 miles a year, it burns about 682 gallons — roughly $2182 a year with fuel at $3.20 a gallon, or $0.145 per mile. The EPA's own published annual figure for the 2023 model is $3500.
Has the Mercedes-Benz AMG C43 4matic Convertible become more efficient over time?
Barely. It sits at 22 MPG today against 22 in 2017 — essentially flat across 7 model years, with efficiency gains offset by weight and power creep.
Is the Mercedes-Benz AMG C43 4matic Convertible efficient for its class?
It ranks 119 of 229 in the Subcompact Cars class on current figures, against a class average of 24.2 MPG. That is 2.2 worse than typical for the class.
EPA test figures from fueleconomy.gov. Cost per mile and annual fuel spend are computed at a reference price of $3.20 per gallon — use your own price. Estimates based on official test figures and average fuel prices. Real-world consumption varies with driving style, load, terrain and maintenance.