2023 Mercedes-Benz GLS 450 in Peoria, AZ

The 7-seater GLS 450 offers excellent performance and remarkable fuel efficiency with a fuel capacity of 23.8 gallons. According to the EPA, its fuel economy ratings are 19 mpg in the city, 23 mpg on the highway, and 21 mpg overall. Other features include an ECO Start/Stop system that automatically turns the engine off at stoplights and in various idle situations to save fuel and cut emissions. Also included are Dynamic Select and AIRMATIC® suspension in the 2023 GLS 450. In addition to a custom mode, Dynamic Select has four preset modes: ECO, Comfort, Sport, and Off-Road. The Off-Road mode is tailored for dirt, gravel, sand, etc., while each method modifies the throttle response, shift points, ESP, and more.