2021 Mercedes-Benz C300 4matic Coupe MPG and Fuel Economy

On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 2021 Mercedes-Benz C300 4matic Coupe.

The 2021 Mercedes-Benz C300 4matic Coupe runs on premium gasoline and is in the Subcompact Cars car class.

Whether you are considering a purchase of the car, or just wanting to find out how economical and environmentally friendly (or un-friendly) your 2021 Mercedes-Benz C300 4matic Coupe is, we have the information you need.

🛣 How Many Miles per Gallon (MPG) Does a 2021 Mercedes-Benz C300 4matic Coupe Get?

First off, the most commonly asked question. A 2021 Mercedes-Benz C300 4matic Coupe gets up to 23 miles per gallon in the city, and 32 miles per gallon on the highway.

The combined average MPG for the 2021 Mercedes-Benz C300 4matic Coupe is 26 miles per gallon.

💵 What is the Average Yearly Fuel Cost for a 2021 Mercedes-Benz C300 4matic Coupe?

The estimated fuel costs for the 2021 Mercedes-Benz C300 4matic Coupe is $2,850 per year.

That value has been estimated by government regulators based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.

If you were to compare a 2021 Mercedes-Benz C300 4matic Coupe to an average vehicle over 5 years, you will spend $2,750 more on fuel.

🛢 How Many Barrels of Petroleum Does a 2021 Mercedes-Benz C300 4matic Coupe Consume?

The 2021 Mercedes-Benz C300 4matic Coupe will consume roughly 11 barrels of petroleum per year, using the standard estimate of 15,000 miles per year.

The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.

💨 How Many Grams of CO2 Does a 2021 Mercedes-Benz C300 4matic Coupe Emit?

For every mile driven, the 2021 Mercedes-Benz C300 4matic Coupe will emit 338 grams of CO2, which is about 5,070,000 grams of CO2 per year.

🌳 To help you understand the impact of this, a normal tree will absorb around 21,000 grams of CO2 per year. This means that roughly 173 trees would be needed to offset emissions from the 2021 Mercedes-Benz C300 4matic Coupe.

Overview

The table below covers all of the miles per gallon, engine specifications, and emission details we have for the 2021 Mercedes-Benz C300 4matic Coupe.

City MPG23
Highway MPG32
Combined MPG26
Save/Spend vs Average CarSpend $2,750
Fuel Cost$2,850
Fuel Type 1Premium
Barrels of Petroleum11
Grams of CO25,070,000
Trees Needed to Offset241
Drive4-Wheel Drive
Cylinders4
Displacement2
TransmissionAutomatic 9-spd
Vehicle ClassSubcompact Cars
Start/Stop?Yes
Supercharged?No
Turbocharged?Yes

Related Mercedes-Benz Models from 2021

If you're interested in other Mercedes-Benz models from 2021, you can find them in the table below. You can click the model link to find miles per gallon and emission information for that model.

ModelCombined MPG
A22029
A220 4matic28
AMG A35 4matic25
AMG C43 4matic21
AMG C43 4matic Convertible22
AMG C43 4matic Coupe22
AMG C6321
AMG C63 Convertible20
AMG C63 Coupe20
AMG C63 S21
AMG C63 S Convertible20
AMG C63 S Coupe20
AMG CLA35 4matic25
AMG CLA45 4matic23
AMG CLS53 4matic Plus23
AMG E53 4matic Plus25
AMG E53 4matic Plus Convertible23
AMG E53 4matic Plus Coupe24
AMG E63 S 4matic Plus18
AMG E63 S 4matic Plus (SW)18

Link To or Reference This Page

If you use this page in your research, please reference MPG Buddy as the source.

  • "2021 Mercedes-Benz C300 4matic Coupe MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/mercedes-benz/c300-4matic-coupe/2021.

  • "2021 Mercedes-Benz C300 4matic Coupe MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/mercedes-benz/c300-4matic-coupe/2021. Accessed January 3, 2026.

  • 2021 Mercedes-Benz C300 4matic Coupe MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/mercedes-benz/c300-4matic-coupe/2021.