The GLS450 is powered by a 362-horsepower twin-turbo V-6 and a 9-speed automatic. A little warmer is the GLS550 with a 449-hp V-8, paired to the same 9-speed auto. Smoking hot is the AMG GLS63 with a 577-hp twin-turbo V-8 and a 7-speed automatic. All versions come standard with all-wheel drive.
All models feel and handle much more confidently than their size indicates with air suspension that damps out all but the worst roads. As a result, the driving sensation isn’t far off from that of a much smaller car, with the difference being much more passenger space. All three rows are spacious enough, and feature plenty of options to spoil passengers like heating and cooling, or multi-way adjustments.
The 2019 GLS can be upgraded with blind-spot monitors, surround-view cameras, and active lane assist.