NRCan fuel consumption ratings
Where the 2021 Mercedes Benz GLS 450 ranks
A number like “8.5 L/100 km” means nothing on its own. This puts it against every other vehicle rated in Canada that year.
Your vehicle
Against every 2021 vehicle rated in Canada
43%more efficient than
About average. The 2021 Mercedes Benz GLS 450 uses 11 L/100 km combined, ranking 592 of 1059.
Within Sport utility vehicle: Standard
74%
More efficient than 74% of the 155 vehicles NRCan puts in this class for 2021.
- Best in class
- 2.2
- Class median
- 12.9
- This vehicle
- 11
- Worst in class
- 17.7
Tailpipe emissions
257 g/km
Cleaner than 45% of 2021 vehicles. NRCan rates it 4 out of 10.
Tailpipe only. It does not count the emissions of producing the fuel, or of generating electricity for an electric vehicle — the EV comparison does account for the grid.
How this is measured: Ranked against vehicles of the same model year, not against everything ever rated — comparing a 2004 SUV with 2026 hybrids would rank the calendar rather than the car. Where a model has several rated versions, the median one is used.
Source: NRCan — Fuel consumption ratings. Data current as of 2026-08-11. 30,784 rated vehicles, 1995 to 2026.