The SR model comes standard with 16-inch steel wheels, a cargo bed rail system with fixed and adjustable tie-downs, a bedliner, a sliding rear window, full power accessories (windows, locks and mirrors), air-conditioning, a tilt-and-telescoping steering wheel with audio controls, a GoPro windshield mount, a rearview camera, Bluetooth phone and audio connectivity, voice controls, Siri Eyes Free (for Apple phones), a 6.1-inch touchscreen interface and a six-speaker audio system with a CD player, a USB port and an auxiliary audio jack. SR5 options include the SR5 Appearance package, which bundles 16-inch silver alloy wheels, body-color over-fenders and an auto-dimming rearview mirror (V6 models only). An expanded version of the Appearance package adds rear parking sensors and an upgraded infotainment bundle with a 7-inch touchscreen, the Entune App Suite, HD radio and an integrated navigation system. The TRD Sport model adds LED daytime running lights, unique exterior trim (including a hood scoop), 17-inch alloy wheels, sport-tuned shock absorbers, a bed-mounted 120-volt power outlet, keyless entry and ignition (automatic transmission only), a wireless phone charger, a leather-trimmed shift lever, special upholstery (shared with the TRD Off-Road), the auto-dimming rearview mirror and the SR5's optional upgraded infotainment bundle. Next up is the TRD Off-Road model, which adds its own rugged body trim (without the TRD Sport's hood scoop), special 16-inch alloy wheels, Bilstein shock absorbers and chin-spoiler delete (to improve the truck's off-road ability). All TRD Off-Road Tacomas share an electronic locking rear differential, and the Crawl Control system (essentially cruise control for off-road maneuvers between 1 and 5 mph) is further added if you select the automatic transmission. All Tacomas come with active front headrests, front-seat side airbags, driver and passenger knee airbags and full-length side curtain airbags, as well as traction and stability control a