Real MPG: Mercedes-Benz GLS (2013 - 2019)
Luxurious and spacious. One of the most comfortable big seven-seat 4x4 SUVs. Outrageous performance from GLS 63 AMG.
Expensive to buy and run. Difficult to park due to its colossal size. You have to pay extra for the off-road system.
Select engine for more Real MPG information:
| Engine | Official MPG (NEDC) | Official MPG (WLTP) | Real MPG Avg. | Real MPG % | |
| GL 350 BlueTec | 36.2 mpg | - | 27.5 mpg | 76% | |
| GL 350 CDI | 36.2 mpg | - | 26.5 mpg | 73% | |
| GL 63 AMG | 23.0 mpg | - | - | - | |
| GLS 350 d | 35.3–37.2 mpg | - | 26.3 mpg | 72% | |
| GLS 400 | 26.2 mpg | - | - | - | |
| GLS 63 AMG | 20.2 mpg | - | 14.0 mpg | 69% |
Read the Honest John review...
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Mercedes-Benz GLS (2013 - 2019)
Luxurious and spacious. One of the most comfortable big seven-seat 4x4 SUVs. Outrageous performance from GLS 63 AMG.
Rivals
| Mercedes-Benz GLS (2013 - 2019) | 24.6 | avg mpg |
| BMW 6 Series Gran Coupe (2012 - 2018) | 38.5 | avg mpg |
| Maserati Ghibli (2013 - 2023) | 31.3 | avg mpg |
| Audi S8 (2012 - 2017) | 23.4 | avg mpg |
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