Based on data from 18 vehicles, 910 fuel-ups and 287,533 miles of driving, the 2020 Mercedes-Benz GLC300 gets a combined Avg MPG of 23.53 with a 0.23 MPG margin of error.

Any Engine Type 2.0L L4 GAS (17) L4 ELECTRIC/GAS (1) Any Body Style Coupe (1) Sport Utility (3) Any Submodel Sport (1) Base (4) 4Matic (13)

Below you can see a distribution of the fuel-ups with 30 outliers (3.19%) removed.

Following shows the average MPG of each of the 18 vehicles in the system.

• 2020 GLC300

  2020 Mercedes-Benz GLC300 2.0L L4 GAS Automatic 9 Speed
  Added Nov 2021 • 96 Fuel-ups

  Property of goose10202

• 24.9 Avg MPG

• My GLC300

  2020 Mercedes-Benz GLC300 2.0L L4 GAS Automatic 9 Speed
  Added Oct 2020 • 137 Fuel-ups

  Property of jaromer

• 25.0 Avg MPG

• GLC 300 4MATIC

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Jan 2023 • 14 Fuel-ups

  Property of GeoVile

• 22.3 Avg MPG

• GLC300 2020

  2020 Mercedes-Benz GLC300 Sport 2.0L L4 GAS Automatic 9 Speed
  Added Aug 2020 • 77 Fuel-ups

  Property of marcelolucas

• 19.3 Avg MPG

• My GLC300

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed
  Added Feb 2020 • 94 Fuel-ups

  Property of ahowie2000

• 21.9 Avg MPG

• Devil's own Benz

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed Sport Utility
  Added Jun 2020 • 123 Fuel-ups

  Property of Greatnewcar

• 24.6 Avg MPG

• Mercedes GLC300

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed
  Added Apr 2021 • 63 Fuel-ups

  Property of Gizza

• 28.0 Avg MPG

• My GLC300

  2020 Mercedes-Benz GLC300 2.0L L4 GAS Automatic 9 Speed
  Added Jul 2022 • 32 Fuel-ups

  Property of 2ndLight

• 21.9 Avg MPG

• My GLC300

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed
  Added Aug 2020 • 131 Fuel-ups

  Property of DWestphal

• 23.6 Avg MPG

• Kang Jiawei

  2020 Mercedes-Benz GLC300 4Matic L4 ELECTRIC/GAS Automatic 9 Speed Sport Utility
  Added Nov 2022 • 13 Fuel-ups

  Property of willydekido

• 88.8 Avg MPG

• My GLC300

  2020 Mercedes-Benz GLC300 2.0L L4 GAS Automatic 9 Speed
  Added Sep 2022 • 29 Fuel-ups

  Property of Thero

• 21.3 Avg MPG

• Joe's GLC300 Coupe

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed Coupe
  Added Dec 2020 • 107 Fuel-ups

  Property of jcg1005

• 26.0 Avg MPG

• Benz

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed
  Added Oct 2021 • 12 Fuel-ups

  Property of Panthe1

• 18.8 Avg MPG

• GLC300

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed
  Added Jul 2020 • 36 Fuel-ups

  Property of soloseven

• 21.4 Avg MPG

• My GLC300

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed
  Added Nov 2020 • 22 Fuel-ups

  Property of shep77

• 20.1 Avg MPG

• 2020 GLC300W4

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed
  Added Feb 2020 • 19 Fuel-ups

  Property of Holger

• 26.1 Avg MPG

• My GLC300

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed
  Added Aug 2020 • 4 Fuel-ups

  Property of cheri3455

• 17.7 Avg MPG

• 2020 GLC300 AMG

  2020 Mercedes-Benz GLC300 4Matic 2.0L L4 GAS Automatic 9 Speed
  Added Oct 2020 • 5 Fuel-ups

  Property of Holger

• 24.4 Avg MPG