Mercedes-Benz C300 MPG by year — every rating on record

The Mercedes-Benz C300 has a combined EPA fuel economy rating for 17 model years, from 2008 to 2027. Across those years its best rated version returned 30 mpg (2024) and its thirstiest returned 20 mpg (2011). The EPA record holds 22 configurations for this nameplate, most recently a Compact Cars.

Year-by-year EPA ratings

Where it has stood in its class

Ranked against every other nameplate the EPA filed under the same class that year. The Mercedes-Benz C300 placed highest in 2027 at #17 of 23, and lowest in 2026 at #62 of 79. It spent 8 of its 17 ranked years in the top half of its class.

Every configuration on record

All 22 configurations EPA lists for this nameplate, newest first.

How the rating has moved between model years

Comparing the best-rated configuration of each year. 4 of 7 year-over-year steps improved the top rating.

What C300 fuel costs over a year

At the EPA's 11,500 miles a year, the 2027 Mercedes-Benz C300 burns 397 to 397 gallons depending on configuration. Below is what that costs at three pump prices, and how much more the thirstiest configuration costs than the most efficient one.

EPA’s own estimate for the 2027 model year is $2,650 to $2,650 a year in fuel, or $2,000 more than the average new vehicle over five years.

How it compares with other Compact Cars

Across the 498 nameplates EPA classifies as Compact Cars, the median best combined rating is 26 mpg. At 29 mpg the Mercedes-Benz C300 is 3 mpg better the median, which is worth about $160 a year at $3.50 a gallon.

• All Compact Cars rankings — every nameplate in the class, best to worst.

Other Mercedes-Benz nameplates

Every Mercedes-Benz model compared → — all nameplates ranked by best combined rating, with what each one costs a year.