The third-gen GLS is offered with both BS6 petrol and diesel engines. The diesel variant is powered by a 3.0-litre engine that produces 330PS/700Nm. Mercedes-Benz offers the GLS 450 with a 3.0-litre petrol motor that puts out 367PS/500Nm and comes with mild-hybrid technology. It offers an additional 22PS and 250Nm boost under hard acceleration. Both variants come paired to a 9-speed AT and are offered with all-wheel drive.