The Buick Regal Sportback comes in four familiar trim levels: base, Preferred, Preferred II and Essence, while the TourX wagon comes in base, Preferred and Essence trims. Standard features in the base include start/stop engine technology, rearview camera, LED taillights, outside heated power-adjustable mirrors, 4G LTE with built in WiFi hotspot, a 7-inch touchscreen-based infotainment system and 17-inch aluminum wheels. The Preferred adds power seats and a leather-wrapped steering wheel. The Preferred II upgrades to a split-folding rear seat, 18" aluminum wheels, fog lamps, a heated steering wheel and an upgraded infotainment system. Essence Regals add heated leather seats. Avenir focuses on interior upgrades with quilt-stitched leather seating surfaces along with an upgraded infotainment system, including a Bose 8-speaker sound system, on-screen navigation, HD radio, an 8-inch color screen and a remote starter. The Avenir also gets 19-inch aluminum wheels, rear cross traffic alert, LED headlamps and a blind spot warning system. The base, Preferred, Essence and Avenir trims receive a 2.0L turbo inline 4-cylinder engine producing 250 horsepower and 260 lb-feet of torque and a 9-speed automatic transmission. All-wheel drive Regals get an 8-speed automatic transmission as well as modified engine tuning for an additional 35 lb-feet of torque. The Buick Regal GS comes with a 3.6L direct-injected V6 and all-wheel drive. This combination produces 310 horsepower and 282 foot pounds of torque mated with a GS-specific 9-speed automatic transmission. The GS also includes driver-adjustable suspension, Brembo performance brakes and 19" wheels. The audio system features an 8-inch display, Android Auto and Apple CarPlay and active noise cancellation. Safety features across the lineup include park assist, Blind Zone Alert, Cross-Traffic Alert, Forward Collision Alert, Lane Departure Warning and Teen Driver Safety Mode. Air bags include dual-stage front, side-impact, knee and curtain side-impact.