for XLT models, and that push-button start, and a power-folding third-row seat are now standard equipment (this feature was optional on the 2017 XLT). A trailer towing package, leather-trimmed seating surfaces, heated front and rear seats, SYNC 3 infotainment system with optional GPS navigation, a power panoramic moonroof, heated and ventilated front bucket seats, the FX4 Off-Road Package (4X4 models only), twenty-inch aluminum-alloy wheels, and other comfort and convenience features are optional. SSV The 2018 Expedition SSV is a fleet-only version of the Expedition XLT, and offers similar standard equipment. The key difference is the transmission and engine are changed slightly for better durability in high idling and high speed environments as the SSV is designed for police use. Limited The 2018 Expedition Limited is built with either a 4X2 or 4X4 build, each with a bigger MAX build. The Limited key features include in-vehicle Wi-Fi with available SYNC Connect, a hands-free foot-activated lift gate, and standard 20-inch ultra bright machined aluminum wheels with dark tarnish painted pockets. A 3.5 EcoBoost engine functions with a 10-speed SelectShift automatic transmission. The Limited also has a fuel tank. A heavy duty engine radiator and two-speed automatic four-wheel-drive with neutral towing capability are optional. The Limited has the equivalent power and handling features of the XLT, though it comes with standard all-season tires. The standard power and handling features include a two-wheel rear-wheel drivetrain, multilink independent rear suspension, Electronic Power Assist (EPAS) rack and pinion steering, AdvanceTrac with stability control, which is designed to provide stability and traction by reducing the chance of spinning the drive wheel, trailer sway control, traction control, and a non-limited-slip 3.15 rear axle on the 4x2 model. A 4X4 Limited build and 4X2 MAX build has a standard 3.31 drive ratio, while a 4X4 MAX build has a 3.73 drive ratio. A Terrain Management System and hill start assist and hill descent control is available for 4x4 models. Optional features on the Limited include a Control Trac four-wheel-drive system, a non-limited-slip 3.31 rear axle or electronic limited-slip differential 3.72 rear axle, continuously controlled damping (CCD) suspension, and an integrated brake controller with the Heavy Duty Trailer Tow package. Unlike the XLT model, the Limited has standard Dual Zone Electronic Automatic Temperature Control (DEATC), and rear auxiliary climate controls. Standard entertainment features include a Harman 12-speaker B&O Play Audio System, a SYNC 3 Enhanced Voice Recognition Communications and Entertainment