2021 Mercedes GLS - MPG Review. 750 Miles - 20mpg+... Is it Possible?

2021 Mercedes GLS miles per gallon review. we achieved 21.6 in the 2021 Mercedes GLS AMG 63. If this machine can do it, the GLS 450 AND 580 should be amazing on MPG.. What kind of range and MPG are you getting? We routinely get 500+ miles range and 20+ mpg.