The 2021 Mercedes-AMG GLS 63 is powered by a 4.0-liter V-8 biturbo engine with 603 hp, a nine-speed automatic transmission and all-wheel drive. In a first for the performance variant, the three-row GLS 63 has an integrated EQ boost starter-generator, which combines a starter motor and an alternator in a single electric motor situated between the engine and transmission, Mercedes says. It provides an additional 21 hp and 184 pound-feet of torque. Here's a roundup of snippets of GLS 63 reviews from the automotive media.
"It took me only a few pulse-quickening, temper-heating miles to realize that driving the GLS 63 AMG on the freeway is nothing but an exercise in frustration, so I headed for the serenity of my favorite canyon roads. I've driven enough high-end SUVs that I should no longer be amazed at their competence, but the GLS 63 turned my frustration to utter awe. It was like driving a sport sedan from a flybridge on the roof. Steering response is sharp. There is …