The Mercedes-Benz C-Class does 24.7 mpg combined (21.9 city, 29.4 highway), which works out to about $1,555 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: Electric does 84 mpg while 4L 8-cyl does 20 — a difference of $1,463 a year. Against other 4-cyl cars it sits below the average of 25.4 mpg.
Every Mercedes-Benz C-Class engine, compared
Picking the right version of the same car 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 |
|---|---|---|---|---|
| Electric | 85 / 83 | 2014–2014 | $457 | |
| 2L 4-cyl | 24.3 / 35.3 | 2019–2022 | $1,357 | |
| 1.8L 4-cyl | 21 / 29.6 | 2003–2013 | $1,587 | |
| 2.2L 4-cyl | 20 / 26.3 | 1994–1996 | $1,722 | |
| 2L 4-cyl Hybrid | 19.3 / 27 | 2023–2026 | $1,722 | |
| 2.3L 4-cyl | 19.4 / 26.8 | 1997–2002 | $1,730 | |
| 3L 6-cyl | 18.7 / 26 | 2008–2018 | $1,770 | |
| 2.5L 6-cyl | 18 / 25 | 2006–2007 | $1,873 | |
| 2.6L 6-cyl | 18 / 24 | 2001–2001 | $1,920 | |
| 4L 8-cyl | 18 / 24 | 2015–2016 | $1,920 |
What that actually costs
Miles per gallon is an abstraction; the fuel bill is not. Here it is in money, at 12,000 miles a year and $3.20 a gallon.
| Measure | Value |
|---|---|
| Cost per mile | $0.130 |
| Fuel per year | $1,555 |
| Fuel over five years | $7,775 |
| Against other 4-cyl cars | +$43 a year |
| EPA's own estimate | $3,221 a year |
City or highway — who is this car for
The gap between city and highway figures tells you whom the car suits. 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 | 21.9 mpg | $1,753 a year if you only drive in town |
| Highway | 29.4 mpg | $1,306 a year if you mostly commute |
| Gap | +7.5 mpg (34%) | Wide — this car dislikes traffic |
How the C-Class changed over the years
Combined figure by model year. 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 | 19 / 27 | 1 | $1,745 | |
| 2025 | 19 / 27 | 1 | $1,745 | |
| 2024 | 20 / 28 | 1 | $1,670 | |
| 2023 | 19 / 26 | 1 | $1,745 | |
| 2022 | 24 / 35 | 1 | $1,371 | |
| 2021 | 25 / 36 | 1 | $1,324 | |
| 2020 | 24 / 35 | 1 | $1,371 | |
| 2019 | 24 / 35 | 1 | $1,371 | |
| 2018 | 20 / 27 | 1 | $1,670 | |
| 2017 | 20 / 28 | 1 | $1,670 | |
| 2016 | 18 / 24 | 1 | $1,920 | |
| 2015 | 18 / 24 | 1 | $1,920 | |
| 2014 | 85 / 83 | 1 | $457 | |
| 2013 | 22 / 31 | 1 | $1,536 | |
| 2012 | 21 / 31 | 1 | $1,536 | |
| 2011 | 18 / 25 | 1 | $1,829 | |
| 2010 | 18 / 26 | 1 | $1,829 | |
| 2009 | 18 / 25 | 1 | $1,829 | |
| 2008 | 18 / 25 | 1 | $1,829 | |
| 2007 | 17 / 23 | 1 | $2,021 | |
| 2006 | 19 / 27 | 1 | $1,745 | |
| 2005 | 21 / 29 | 1 | $1,600 | |
| 2004 | 20 / 28 | 1 | $1,670 | |
| 2003 | 21 / 29 | 1 | $1,600 | |
| 2002 | 19 / 26 | 1 | $1,829 | |
| 2001 | 18 / 24 | 1 | $1,920 | |
| 2000 | 19 / 26 | 1 | $1,745 | |
| 1999 | 19 / 26 | 1 | $1,745 | |
| 1998 | 20 / 28 | 1 | $1,670 | |
| 1997 | 20 / 28 | 1 | $1,670 |
MPG is a number. Dollars per year is the answer.
- Fuel profile built from your actual mileage and local prices
- Fuel tracker: what you really spend, month by month
- Insurance and fuel folded into 5-year cost to own
- Compare any two cars on total cost, not sticker price
- No ads, no tracking — and much more
How we count
Fuel-economy figures come from EPA fueleconomy.gov — the same laboratory numbers printed on the window sticker. We don't adjust them; real-world consumption depends on how and where you drive.
What we add is money. Yearly cost assumes 12,000 miles at $3.20 a gallon — change either and the ranking stays, only the size of the bill moves. Cost per mile is the same figure divided out, useful when comparing a commute against a weekend car.
Frequently asked questions
What mpg does the Mercedes-Benz C-Class get?
24.7 mpg combined on average — 21.9 in the city and 29.4 on the highway, per EPA ratings across 1994–2026.
How much does a Mercedes-Benz C-Class cost in fuel per year?
About $1,555 at 12,000 miles and $3.20 a gallon — roughly $7,775 over five years, or 0.130 dollars a mile.
Which C-Class engine is the most economical?
The Electric at 84 mpg, against 20 for the 4L 8-cyl — a difference of about $1,463 a year.
Is the C-Class good on fuel compared with similar cars?
Against other 4-cyl cars it sits below the average of 25.4 mpg, computed across 6877 ratings.
Are these real-world figures?
No — they are EPA laboratory ratings, the same ones on the window sticker. Real consumption depends on driving style, terrain, load and weather, and is typically a little worse.