Mercedes-Benz GLC300 4matic (coupe) MPG by year — every rating on record
The Mercedes-Benz GLC300 4matic (coupe) has a combined EPA fuel economy rating for 2 model years, from 2026 to 2027. Across those years its best rated version returned 26 mpg (2026) and its thirstiest returned 26 mpg (2026). The EPA record holds 2 configurations for this nameplate, most recently a Small Sport Utility Vehicle 4WD.
Year-by-year EPA ratings
| Model year | Configurations | Best combined | Worst combined | Class rank that year | Drivetrains | Fuel | EPA class |
|---|---|---|---|---|---|---|---|
| 2026 | 1 | 26 mpg | 26 mpg | #118 of 188 (37th pct) | All-Wheel Drive | Premium | Small Sport Utility Vehicle 4WD |
| 2027 | 1 | 26 mpg | 26 mpg | #34 of 49 (31th pct) | All-Wheel Drive | Premium | Small Sport Utility Vehicle 4WD |
Where it has stood in its class
Ranked against every other nameplate the EPA filed under the same class that year. The Mercedes-Benz GLC300 4matic (coupe) placed highest in 2027 at #34 of 49, and lowest in 2026 at #118 of 188. It spent 0 of its 2 ranked years in the top half of its class.
Every configuration on record
All 2 configurations EPA lists for this nameplate, newest first.
| Year | Configuration | Engine detail | City | Highway | Combined | Gallons/yr | Barrels/yr | EPA fuel cost/yr | CO2 g/mi | GHG |
|---|---|---|---|---|---|---|---|---|---|---|
| 2027 | 2.0L 4-cyl All-Wheel Drive Automatic 9-spd Premium | SIDI; Mild Hybrid, turbocharged, Hybrid, start-stop | 23 | 31 | 26 | 442.3 | 11.4 | $3,000 | 338 | 5/10 |
| 2026 | 2.0L 4-cyl All-Wheel Drive Automatic 9-spd Premium | SIDI; Mild Hybrid, turbocharged, Hybrid, start-stop | 23 | 31 | 26 | 442.3 | 11.4 | $3,000 | 337 | 5/10 |
What GLC300 4matic (coupe) fuel costs over a year
At the EPA's 11,500 miles a year, the 2027 Mercedes-Benz GLC300 4matic (coupe) burns 442 to 442 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.
| Pump price | Most efficient | Thirstiest | Spread |
|---|---|---|---|
| $3.00/gal | $1,327 | $1,327 | $0 |
| $3.50/gal | $1,548 | $1,548 | $0 |
| $4.00/gal | $1,769 | $1,769 | $0 |
EPA’s own estimate for the 2027 model year is $3,000 to $3,000 a year in fuel, or $3,750 more than the average new vehicle over five years.
How it compares with other Small Sport Utility Vehicle 4WD
Across the 311 nameplates EPA classifies as Small Sport Utility Vehicle 4WD, the median best combined rating is 27 mpg. At 26 mpg the Mercedes-Benz GLC300 4matic (coupe) is 1 mpg below the median, which is worth about $57 a year at $3.50 a gallon.
- All Small Sport Utility Vehicle 4WD 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.