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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 a split-folding rear seat, 18" aluminum wheels, fog lamps, a heated steering wheel and an upgraded the infotainment system. Essence Regals add heated leather seats. The TourX only comes with the 2.0L turbo engine and all-wheel drive combination. It features an impressive 33 cubic feet of cargo space, expandable to 74 cubic feet by folding the rear seatbacks down. All trims save the GS receive a 2.0L turbo inline 4-cylinder engine producing 250 horsepower and 260 lb-feet of torque. When equipped with optional all-wheel drive torque is bumped to 295 foot pounds and an 8-speed transmission replaces the standard 9-speed automatic paired to the front wheel drive model. The Buick Regal GS comes with a 3.6L direct-injected V6 and in all-wheel drive only. 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 and Lane Departure Warning. Air bags include dual-stage front, side-impact, knee and curtain side-impact and Teen Driver Safety Mode.