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Mercedes-Benz W205 C180 2021
Shown: Mercedes-Benz W205 C180 2021. Photo: Ethan Llamas, CC BY-SA 4.0, via Wikimedia Commons
  • Newest year: 2021
  • Gas
  • Small cars

2015-2021 Mercedes-Benz C-Class MPG & Fuel Cost

7 model years · 15–28 MPG combined

27 MPG
Combined
23 MPG
City
35 MPG
Highway
Annual fuel cost · C300 2.0L 4-cyl turbo RWD
$2,930

15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)

Cheaper to fuel than 6 of 10 small car configurations, MY2021. Ranked against all rated configurations, not sales-weighted.

Previous generation: 2008-2014 Next generation: 2022-2027

2015-2021 Mercedes-Benz C-Class at a glance

The 2015-2021 Mercedes-Benz C-Class covers 7 model years in the EPA database (92 configurations in all), rated 15–28 MPG combined. The newest model year, 2021, costs about $2,930 a year to fuel for its most efficient version, the C300 2.0L 4-cyl turbo RWD (27 MPG), at premium gasoline $5.36/gal (U.S. average, Sep 2026). Powertrains over the years: gas and plug-in hybrid. EPA changed the ratings in 2016, 2017, 2018, 2019, 2020 and 2021. The best combined rating in the generation, 28 MPG, was reached in 2015, 2016, 2017 and 2020.

2015-2021 Mercedes-Benz C-Class by model year

2015-2021 Mercedes-Benz C-Class: EPA combined rating and yearly fuel cost for each model year
Model yearPowertrainsCombined$/yrEPA ratings
2021 Gas 20–27 MPG $2,930–$4,080 Ratings changed
2020 Gas 20–28 MPG $2,870–$4,080 Ratings changed
2019 Gas 20–27 MPG $3,000–$4,080 Ratings changed
2018 Gas, Plug-in hybrid 19–27 MPG $2,380–$4,250 Ratings changed
2017 Gas, Plug-in hybrid 19–28 MPG $2,380–$4,250 Ratings changed
2016 Gas, Plug-in hybrid 20–28 MPG $2,380–$3,980 Ratings changed
2015 Gas 15–28 MPG $2,890–$5,190 First year

What the 2021 C300 2.0L 4-cyl turbo RWD costs to drive

Per month

$244

$2,930 a year ÷ 12

Per 25 miles

$4.88

Per 100 miles

$19.53

Five years

$14,650

5 × the yearly cost, prices held at today's level

vs the small car median

$280less a year

Class median $3,210 a year, MY2021

Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).

2021 Mercedes-Benz C-Class MPG

Versus 2020: The most efficient configuration moves from 28 to 27 MPG, down 1. Its annual cost goes from $2,870 to $2,930, $60 more.

Gas · 2.0L, 3.0L, 4.0L
Combined
20–27 MPG
Per year
$2,930–$4,080

Gas configurations (15)

2021 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost
TrimEngineDriveCityHwyComb.$/yr
C300 (Most efficient) 2.0L 4-cyl turbo RWD 23 35 27 $2,930
C300 4matic 2.0L 4-cyl turbo 4WD 23 33 27 $2,970
C300 Coupe 2.0L 4-cyl turbo RWD 24 33 27 $2,990
C300 4matic Coupe 2.0L 4-cyl turbo 4WD 23 32 26 $3,070
C300 Convertible 2.0L 4-cyl turbo RWD 23 31 26 $3,140
C300 4matic Convertible 2.0L 4-cyl turbo 4WD 22 30 25 $3,250
AMG C43 4matic Convertible 3.0L 6-cyl turbo 4WD 19 27 22 $3,650
AMG C43 4matic Coupe 3.0L 6-cyl turbo 4WD 19 27 22 $3,690
AMG C43 4matic 3.0L 6-cyl turbo 4WD 18 27 21 $3,860
AMG C63 4.0L 8-cyl turbo RWD 17 26 21 $3,910
Show 5 more configurations
2021 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost (+5)
TrimEngineDriveCityHwyComb.$/yr
AMG C63 S4.0L 8-cyl turboRWD172621$3,910
AMG C63 S Coupe4.0L 8-cyl turboRWD172620$3,970
AMG C63 Coupe4.0L 8-cyl turboRWD172620$3,970
AMG C63 S Convertible4.0L 8-cyl turboRWD172520$4,080
AMG C63 Convertible4.0L 8-cyl turboRWD172520$4,080

15 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).

2020 Mercedes-Benz C-Class MPG

20–28 MPG · $2,870–$4,080/yr

Versus 2019: The most efficient configuration moves from 27 to 28 MPG, up 1. Its annual cost goes from $3,000 to $2,870, $130 less.

Gas · 2.0L, 3.0L, 4.0L
Combined
20–28 MPG
Per year
$2,870–$4,080

Gas configurations (15)

2020 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost
TrimEngineDriveCityHwyComb.$/yr
C300 (Most efficient) 2.0L 4-cyl turbo RWD 24 35 28 $2,870
C300 4matic 2.0L 4-cyl turbo 4WD 23 33 26 $3,060
C300 Coupe 2.0L 4-cyl turbo RWD 22 31 25 $3,200
C300 4matic Coupe 2.0L 4-cyl turbo 4WD 21 30 25 $3,260
C300 Convertible 2.0L 4-cyl turbo RWD 21 29 24 $3,370
C300 4matic Convertible 2.0L 4-cyl turbo 4WD 21 29 24 $3,380
Show 5 more configurations
2020 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost (+9)
TrimEngineDriveCityHwyComb.$/yr
AMG C43 4matic3.0L 6-cyl turbo4WD192722$3,670
AMG C43 4matic Coupe3.0L 6-cyl turbo4WD192722$3,700
AMG C43 4matic Convertible3.0L 6-cyl turbo4WD182521$3,810
AMG C634.0L 8-cyl turboRWD182721$3,830
AMG C63 S4.0L 8-cyl turboRWD182721$3,830
AMG C63 S Coupe4.0L 8-cyl turboRWD172620$4,010
AMG C63 Coupe4.0L 8-cyl turboRWD172620$4,010
AMG C63 S Convertible4.0L 8-cyl turboRWD172420$4,080
AMG C63 Convertible4.0L 8-cyl turboRWD172420$4,080

15 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).

2019 Mercedes-Benz C-Class MPG

20–27 MPG · $3,000–$4,080/yr

Versus 2018: The most efficient configuration stays at 27 MPG. Its annual cost goes from $2,950 to $3,000, $50 more.

Gas · 2.0L, 3.0L, 4.0L
Combined
20–27 MPG
Per year
$3,000–$4,080

Gas configurations (15)

2019 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost
TrimEngineDriveCityHwyComb.$/yr
C300 (Most efficient) 2.0L 4-cyl turbo RWD 23 34 27 $3,000
C300 4matic 2.0L 4-cyl turbo 4WD 22 33 26 $3,090
C300 Coupe 2.0L 4-cyl turbo RWD 22 31 25 $3,230
C300 4matic Coupe 2.0L 4-cyl turbo 4WD 22 31 25 $3,240
C300 Convertible 2.0L 4-cyl turbo RWD 21 29 24 $3,350
C300 4matic Convertible 2.0L 4-cyl turbo 4WD 21 29 24 $3,360
Show 5 more configurations
2019 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost (+9)
TrimEngineDriveCityHwyComb.$/yr
AMG C43 4matic3.0L 6-cyl turbo4WD192722$3,670
AMG C43 4matic Coupe3.0L 6-cyl turbo4WD192722$3,700
AMG C43 4matic Convertible3.0L 6-cyl turbo4WD182521$3,810
AMG C634.0L 8-cyl turboRWD182721$3,830
AMG C63 S4.0L 8-cyl turboRWD182721$3,830
AMG C63 S Coupe4.0L 8-cyl turboRWD172620$4,010
AMG C63 Coupe4.0L 8-cyl turboRWD172620$4,010
AMG C63 S Convertible4.0L 8-cyl turboRWD172420$4,080
AMG C63 Convertible4.0L 8-cyl turboRWD172420$4,080

15 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).

2018 Mercedes-Benz C-Class MPG

19–27 MPG · $2,380–$4,250/yr

Versus 2017: The most efficient configuration moves from 28 to 27 MPG, down 1. Its annual cost goes from $2,890 to $2,950, $60 more.

Gas · 2.0L, 3.0L, 4.0L
Combined
19–27 MPG
Per year
$2,950–$4,250
See gas configurations
Plug-in hybrid · 2.0L
Gas-only combined
30 MPG
Per year
$2,380

On electricity 51 MPGe, with 9 miles of electric range.

See plug-in hybrid configurations

Gas configurations (15)

2018 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost
TrimEngineDriveCityHwyComb.$/yr
C300 (Most efficient) 2.0L 4-cyl turbo RWD 24 33 27 $2,950
C300 4matic 2.0L 4-cyl turbo 4WD 23 32 26 $3,040
C300 Coupe 2.0L 4-cyl turbo RWD 22 30 25 $3,170
C300 4matic Coupe 2.0L 4-cyl turbo 4WD 22 30 25 $3,190
C300 Convertible 2.0L 4-cyl turbo RWD 22 29 25 $3,220
C300 4matic Convertible 2.0L 4-cyl turbo 4WD 22 29 25 $3,260
Show 5 more configurations
2018 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost (+9)
TrimEngineDriveCityHwyComb.$/yr
AMG C43 4matic3.0L 6-cyl turbo4WD202723$3,570
AMG C43 4matic Coupe3.0L 6-cyl turbo4WD202722$3,580
AMG C43 4matic Convertible3.0L 6-cyl turbo4WD192622$3,670
AMG C634.0L 8-cyl turboRWD182420$3,990
AMG C63 S4.0L 8-cyl turboRWD182420$3,990
AMG C63 S Coupe4.0L 8-cyl turboRWD172319$4,140
AMG C63 Coupe4.0L 8-cyl turboRWD172319$4,140
AMG C63 S Convertible4.0L 8-cyl turboRWD172219$4,250
AMG C63 Convertible4.0L 8-cyl turboRWD172219$4,250

15 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).

Plug-in hybrid configurations (1)

2018 Mercedes-Benz C-Class plug-in hybrid configurations: EPA ratings and annual cost
TrimDriveGas MPGElectric MPGeElectric range$/yr
C350e (Most efficient) RWD 30 51 9 mi $2,380

Cost assumes EPA's utility factor: 30% of miles are driven on electricity (residential electricity 18.3¢/kWh (U.S. average, Jul 2026)) and the rest on gasoline (premium gasoline $5.36/gal (U.S. average, Sep 2026)).

2017 Mercedes-Benz C-Class MPG

19–28 MPG · $2,380–$4,250/yr

Versus 2016: The most efficient configuration stays at 28 MPG. Its annual cost goes from $2,850 to $2,890, $40 more.

Gas · 2.0L, 3.0L, 4.0L
Combined
19–28 MPG
Per year
$2,890–$4,250
See gas configurations
Plug-in hybrid · 2.0L
Gas-only combined
30 MPG
Per year
$2,380

On electricity 51 MPGe, with 9 miles of electric range.

See plug-in hybrid configurations

Gas configurations (15)

2017 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost
TrimEngineDriveCityHwyComb.$/yr
C300 (Most efficient) 2.0L 4-cyl turbo RWD 24 34 28 $2,890
C300 4matic 2.0L 4-cyl turbo 4WD 24 31 27 $3,010
C300 Convertible 2.0L 4-cyl turbo RWD 23 31 26 $3,100
C300 Coupe 2.0L 4-cyl turbo RWD 23 30 26 $3,150
C300 4matic Coupe 2.0L 4-cyl turbo 4WD 23 29 25 $3,200
C300 4matic Convertible 2.0L 4-cyl turbo 4WD 22 29 25 $3,270
Show 5 more configurations
2017 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost (+9)
TrimEngineDriveCityHwyComb.$/yr
AMG C43 4matic3.0L 6-cyl turbo4WD202823$3,450
AMG C43 4matic Coupe3.0L 6-cyl turbo4WD202823$3,510
AMG C43 4matic Convertible3.0L 6-cyl turbo4WD192622$3,700
AMG C634.0L 8-cyl turboRWD182521$3,900
AMG C63 S4.0L 8-cyl turboRWD182420$3,990
AMG C63 S Coupe4.0L 8-cyl turboRWD172319$4,140
AMG C63 Coupe4.0L 8-cyl turboRWD172319$4,140
AMG C63 S Convertible4.0L 8-cyl turboRWD172219$4,250
AMG C63 Convertible4.0L 8-cyl turboRWD172219$4,250

15 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).

Plug-in hybrid configurations (1)

2017 Mercedes-Benz C-Class plug-in hybrid configurations: EPA ratings and annual cost
TrimDriveGas MPGElectric MPGeElectric range$/yr
C350e (Most efficient) RWD 30 51 9 mi $2,380

Cost assumes EPA's utility factor: 30% of miles are driven on electricity (residential electricity 18.3¢/kWh (U.S. average, Jul 2026)) and the rest on gasoline (premium gasoline $5.36/gal (U.S. average, Sep 2026)).

2016 Mercedes-Benz C-Class MPG

20–28 MPG · $2,380–$3,980/yr

Versus 2015: The most efficient configuration stays at 28 MPG. Its annual cost goes from $2,890 to $2,850, $40 less.

Gas · 2.0L, 3.0L, 4.0L
Combined
20–28 MPG
Per year
$2,850–$3,980
See gas configurations
Plug-in hybrid · 2.0L
Gas-only combined
30 MPG
Per year
$2,380

On electricity 51 MPGe, with 11 miles of electric range.

See plug-in hybrid configurations

Gas configurations (5)

2016 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost
TrimEngineDriveCityHwyComb.$/yr
C300 (Most efficient) 2.0L 4-cyl turbo RWD 25 34 28 $2,850
C300 4matic 2.0L 4-cyl turbo 4WD 24 31 27 $2,980
C450 AMG 3.0L 6-cyl turbo 4WD 21 28 24 $3,370
AMG C63 4.0L 8-cyl turbo RWD 18 25 20 $3,980
AMG C63 S 4.0L 8-cyl turbo RWD 18 25 20 $3,980

5 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).

Plug-in hybrid configurations (1)

2016 Mercedes-Benz C-Class plug-in hybrid configurations: EPA ratings and annual cost
TrimDriveGas MPGElectric MPGeElectric range$/yr
C350e (Most efficient) RWD 30 51 11 mi $2,380

Cost assumes EPA's utility factor: 30% of miles are driven on electricity (residential electricity 18.3¢/kWh (U.S. average, Jul 2026)) and the rest on gasoline (premium gasoline $5.36/gal (U.S. average, Sep 2026)).

2015 Mercedes-Benz C-Class MPG

15–28 MPG · $2,890–$5,190/yr
Gas · 1.8L, 2.0L, 3.0L…
Combined
15–28 MPG
Per year
$2,890–$5,190

Gas configurations (9)

2015 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost
TrimEngineDriveCityHwyComb.$/yr
C300 (Most efficient) 2.0L 4-cyl turbo RWD 25 33 28 $2,890
C300 4matic 2.0L 4-cyl turbo 4WD 24 31 27 $3,010
C250 Coupe 1.8L 4-cyl turbo RWD 21 31 25 $3,230
C400 4matic 3.0L 6-cyl turbo 4WD 21 28 24 $3,390
C350 Coupe 3.5L 6-cyl RWD 20 28 23 $3,470
C350 4matic Coupe 3.5L 6-cyl 4WD 19 27 22 $3,630
Show 0 more configurations
2015 Mercedes-Benz C-Class gas configurations: EPA ratings and annual cost (+3)
TrimEngineDriveCityHwyComb.$/yr
AMG C634.0L 8-cyl turboRWD182420$3,990
AMG C63 S4.0L 8-cyl turboRWD182420$3,990
C63 AMG Coupe6.2L 8-cylRWD131915$5,190

9 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).

Fuel cost by state

Yearly cost of the C300 2.0L 4-cyl turbo RWD: $3,500 in California and $2,540 in Texas, a $960 difference.

Gasoline prices: California: California state average; Washington: Washington state average; New York: New York state average; Florida: Florida state average; Texas: Texas state average (Sep 2026).
Fuel cost in every state

Similar cars

Closest combined MPG among MY2021 small car models.

2019 Volvo S60 T5

2021 Volvo S60

27 MPG · $2,930/yr
2020 Cadillac CT4 Premium Luxury

2021 Cadillac CT4

27 MPG · $2,960/yr
2014-2018 BMW M235i (F22) coupe

2021 BMW 2 Series

28 MPG · $2,910/yr
2021 Mercedes-Benz E 200 (W213)

2021 Mercedes-Benz E-Class

26 MPG · $3,080/yr
EPA ratings: fueleconomy.gov file of Sep 29, 2026 · Prices: EIA regular gasoline, U.S. average, Sep 2026 ($4.36/gal) · 15,000 mi/yr, 55% city / 45% highway · How we calculate

Generations

All Mercedes-Benz C-Class years All Mercedes-Benz models

Frequently asked questions

What gas mileage does the 2015-2021 Mercedes-Benz C-Class get?

EPA rates the 2015-2021 Mercedes-Benz C-Class at 15–28 MPG combined across 92 configurations and 7 model years. The most efficient version, the 2020 C300 2.0L 4-cyl turbo RWD, is rated 28 MPG (24 city, 35 highway). By powertrain: Gas: 15–28 MPG; Plug-in hybrid: 30 MPG.

Which years had the best MPG in the 2015-2021 Mercedes-Benz C-Class?

The C300 2.0L 4-cyl turbo RWD reached the generation's best combined rating, 28 MPG, in 2015, 2016, 2017 and 2020. The lowest top rating, 27 MPG, was in 2018, 2019 and 2021.

Did EPA ratings change during the 2015-2021 Mercedes-Benz C-Class?

Yes. Ratings changed in 2016, 2017, 2018, 2019, 2020 and 2021.

How does the 2015-2021 Mercedes-Benz C-Class compare with the previous generation?

The previous generation (2008-2014 Mercedes-Benz C-Class) is rated 15–25 MPG combined and costs $3,220–$5,360 a year to fuel; the 2015-2021 model is rated 15–28 MPG and costs $2,380–$5,190 a year.

How much does it cost to fuel a 2021 Mercedes-Benz C-Class per year?

Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the C300 2.0L 4-cyl turbo RWD costs about $2,930 a year. Across all 15 configurations the cost runs $2,930–$4,080 a year. That is a $1,150 difference between the cheapest and the costliest configuration.

How much does it cost to drive a 2021 Mercedes-Benz C-Class 100 miles?

About $19.53 per 100 miles for the C300 2.0L 4-cyl turbo RWD at premium gasoline $5.36/gal (U.S. average, Sep 2026), and between $19.53 and $27.20 across all configurations. That is the annual cost over 15,000 miles divided by 150.

Is the 2021 Mercedes-Benz C-Class more efficient in the city or on the highway?

The C300 2.0L 4-cyl turbo RWD is rated 23 city and 35 highway MPG, so it is more efficient on the highway, by 12 MPG.

How does the 2021 Mercedes-Benz C-Class compare with other small car configurations?

The C300 2.0L 4-cyl turbo RWD costs about $2,930 a year to fuel, $280 less than the class median of $3,210, and less than 6 of 10 small car configurations. The comparison covers all 298 rated small car configurations for MY2021, not weighted by sales.

Is the 2021 Mercedes-Benz C-Class different from the 2020 model?

The most efficient configuration moves from 28 to 27 MPG, down 1. Its annual cost goes from $2,870 to $2,930, $60 more. EPA lists 15 configurations for 2021 against 15 configurations for 2020. See the 2020 Mercedes-Benz C-Class for that year.