Mercedes calls the GLS class S among SUVs: its rich equipment and power guarantee the award 10Best 2018. Three rows offer space for seven people; the interior has leather, wood and other options such as an air ionization system and heated and cooled cup holders. The GLS450 has a 362 hp turbo with a double V-6; The GLS550 has a 2-turbo V8 with 449 hp. Each model has four-wheel drive and nine-speed automatic. Safety technology includes cross-over assistance, frontal collision warning and automatic emergency braking.