2021 Mercedes-Benz GLC300 4matic MPG
EPA-rated · verified snapshot 2026-08-30 · Small Sport Utility Vehicle 4WD
The 2021 Mercedes-Benz GLC300 4matic gets 23 MPG combined — 21 city and 28 highway — in its most efficient configuration (2.0L · 4-cyl · Automatic 9-spd · 4-Wheel Drive).
City21 MPG
Highway28 MPG
$3,300Fuel cost / yr (EPA est.)
379 g/miCO₂
PremiumFuel
$-5,5005-yr fuel cost vs. average vehicle
5 / 10EPA Fuel Economy & GHG score
Where it sits among compact suvs (2021)
Compared with the 2020 model, the 2021 GLC300 4matic is -1 MPG worse at its best.
FAQ
Does the 2021 GLC300 4matic get good gas mileage for its class?
The 2021 GLC300 4matic's 23 MPG combined is below the compact suvs average of 28.1 MPG for 2021.
How much does it cost to fuel a 2021 GLC300 4matic per year?
Based on EPA assumptions (15,000 miles/year), estimated annual fuel cost is $3,300 for the most efficient trim.
What is the city and highway MPG of the 2021 GLC300 4matic?
The most efficient trim is rated 21 MPG city and 28 MPG highway.