The Mercedes-Benz C-Class does 22.2 mpg combined (19.4 city, 26.9 highway), which works out to about $1,730 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 2L 4-cyl Hybrid does 29.5 mpg while 3.2L 6-cyl does 20 — a difference of $618 a year. Against other V6 cars it sits above the average of 19.9 mpg.
Every Mercedes-Benz C-Class engine, compared
Gas mileage on the Mercedes-Benz C-Class ranges from 29.5 down to 20 depending on which engine sits under the bonnet — a spread of $618 a year across 12 versions of the same car. Picking the right one often saves more fuel than picking a different car altogether. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2L 4-cyl Hybrid | 26.3 / 34.1 | 2016–2026 | $1,302 | |
| 2L 4-cyl | 23.4 / 33.1 | 2015–2023 | $1,422 | |
| 1.8L 4-cyl | 21.2 / 29.8 | 2003–2014 | $1,580 | |
| 3.5L 6-cyl | 20 / 28.7 | 2012–2014 | $1,670 | |
| 2.2L 4-cyl | 20 / 26.3 | 1994–1996 | $1,722 | |
| 2.3L 4-cyl | 19.4 / 26.8 | 1997–2002 | $1,730 | |
| 3L 6-cyl | 19.1 / 26.8 | 2007–2023 | $1,738 | |
| 2.5L 6-cyl | 19 / 27 | 2006–2006 | $1,745 | |
| 4L 8-cyl | 17.6 / 25.1 | 2015–2023 | $1,882 | |
| 2.8L 6-cyl | 18.1 / 24.4 | 1994–2000 | $1,892 | |
| 2.6L 6-cyl | 17.3 / 23.5 | 2001–2005 | $1,920 | |
| 3.2L 6-cyl | 18 / 24 | 2003–2003 | $1,920 |
What that actually costs
The Mercedes-Benz C-Class burns a gallon every 22.2 miles, so 12,000 miles takes about 541 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.144 |
| Fuel per year | $1,730 |
| Fuel over five years | $8,650 |
| Against other V6 cars | −$200 a year |
| EPA's own estimate | $3,573 a year |
City or highway — who is this car for
The Mercedes-Benz C-Class gives up 7.5 mpg the moment you leave the motorway — 26.9 out there against 19.4 in town, a 39% drop worth $551 a year. A wide gap punishes stop-and-start traffic; a narrow one means the car doesn't care where you drive it.
| Measure | Value | Reading |
|---|---|---|
| City | 19.4 mpg | $1,979 a year if you only drive in town |
| Highway | 26.9 mpg | $1,428 a year if you mostly commute |
| Gap | +7.5 mpg (39%) | Wide — this car dislikes traffic |
How the C-Class changed over the years
The C-Class peaked in 2024 at 30 mpg (26 city, 36 highway) and was at its thirstiest in 2011 at 18 — 12 mpg apart, or $853 a year in fuel between buying one year and the other. The 2026 car does 29. Jumps usually mark a new generation or a new engine; dips often mean a heavier body or added all-wheel drive.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2026 | 25 / 35 | 1 | $1,324 | |
| 2025 | 25 / 35 | 1 | $1,324 | |
| 2024 | 26 / 36 | 1 | $1,280 | |
| 2023 | 20 / 29.5 | 4 | $1,613 | |
| 2022 | 22 / 31.3 | 3 | $1,518 | |
| 2021 | 19.7 / 29.3 | 3 | $1,648 | |
| 2020 | 20.3 / 29.7 | 3 | $1,620 | |
| 2019 | 20 / 29.3 | 3 | $1,648 | |
| 2018 | 22.5 / 29 | 4 | $1,536 | |
| 2017 | 22.5 / 29.8 | 4 | $1,506 | |
| 2016 | 23 / 29.3 | 4 | $1,506 | |
| 2015 | 21.3 / 28.3 | 3 | $1,600 | |
| 2014 | 18.3 / 26.3 | 3 | $1,829 | |
| 2013 | 18.3 / 26 | 3 | $1,803 | |
| 2012 | 18 / 26.3 | 3 | $1,803 | |
| 2011 | 15.5 / 22 | 2 | $2,133 | |
| 2010 | 15 / 22.5 | 2 | $2,133 | |
| 2009 | 15 / 22 | 2 | $2,133 | |
| 2008 | 15 / 22 | 2 | $2,133 | |
| 2007 | 19 / 26 | 1 | $1,745 | |
| 2006 | 17 / 23.5 | 2 | $1,969 | |
| 2005 | 17.3 / 24 | 3 | $1,920 | |
| 2004 | 18.5 / 25.5 | 2 | $1,786 | |
| 2003 | 19.5 / 26.5 | 2 | $1,745 | |
| 2002 | 18 / 25 | 2 | $1,873 | |
| 2001 | 18 / 24 | 1 | $1,920 | |
| 2000 | 18 / 24 | 3 | $1,892 | |
| 1999 | 18 / 24 | 3 | $1,892 | |
| 1998 | 18 / 24.7 | 3 | $1,892 | |
| 1997 | 19 / 26 | 2 | $1,786 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 81 EPA ratings of the Mercedes-Benz C-Class — 16 engines across 1994–2026. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $3,573. Full method.
Frequently asked questions
What mpg does the Mercedes-Benz C-Class get?
22.2 mpg combined on average — 19.4 in the city and 26.9 on the highway, per EPA ratings across 1994–2026.
How much does a Mercedes-Benz C-Class cost in fuel per year?
About $1,730 at 12,000 miles and $3.20 a gallon — roughly $8,650 over five years, or 0.144 dollars a mile.
Which C-Class engine is the most economical?
The 2L 4-cyl Hybrid at 29.5 mpg, against 20 for the 3.2L 6-cyl — a difference of about $618 a year.
Is the C-Class good on fuel compared with similar cars?
Against other V6 cars it sits above the average of 19.9 mpg, computed across 4940 ratings.
Are these real-world C-Class figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Mercedes-Benz C-Class is $3,573 against the $1,730 we compute at 12,000 miles. Expect a little worse in practice: the spread between the 30 and 15 mpg versions of this car is smaller than the spread between two drivers of the same one.
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