The leather-lined Mercedes-Maybach GLS 600 SUV will rival the likes of the Bentley Bentayga and Range Rover, and will feature unique styling cues, a mild-hybrid drivetrain, all-wheel drive, active air-sprung suspension, and an upgraded interior with generous equipment level in accord with the brand’s upper-crust luxury positioning.Inside, the 5.2-meter-long SUV has an upgraded interior with…