through an eight-inch touchscreen display in the dash, and home to twin 4.2-inch displays that flank a central speedometer, falling in line with the rest of the Lincoln models. The push-button start became standard, likewise a passive entry and a rear-view camera. Blind-spot monitoring was added as an optional feature. Both the updated Navigator and Navigator L went into production in the summer of 2014, and arrived to dealers that fall as a 2015 model. Safety Fourth generation (2018–present) On April 12, 2017, the fourth-generation 2018 Lincoln Navigator was introduced at the 2017 New York Auto Show. As with previous generations, the fourth-generation remains the Lincoln counterpart of the Ford Expedition, offered in both a standard and long-wheelbase configuration (Lincoln Navigator L). As before, both two and four-wheel drive versions are offered. The fourth-generation marked a significant shift in the exterior styling of the Navigator, as it adopted styling features of the 2017 Lincoln Continental. In another major shift, the model line adopted aluminum body construction. Chassis The fourth-generation Lincoln Navigator uses the Ford T3 platform, developed under the U554 code name. Retaining body-on-frame construction, the Lincoln Navigator (and Ford Expedition) were engineered alongside the 2015 Ford F-150. The four-wheel independent suspension configuration was retained, with a redesigned rear suspension layout. Shared with the Ford F-150 Raptor, the Lincoln Navigator is equipped with a 450 hp twin-turbocharged 3.5L EcoBoost V6 (although Lincoln has ended its use of the EcoBoost nomenclature). The highest-output engine ever sold by Lincoln, the 3.5L V6 is paired with a 10-speed automatic transmission (replacing the previous 6-speed automatic). Body Entering production with only minor differences from the Lincoln Navigator concept vehicle shown at the 2016 New York Auto Show (no inclusion of the gullwing doors and stair-style running boards, used largely for display purposes). The 2018 Lincoln Navigator adopted several design features from the 2017 Lincoln Continental, including the style of its headlights, taillights, side vents, and its front fascia, with a large rectangular grille and a centered Lincoln star emblem. While sharing its roofline and side doors with the Ford Expedition, in the style of Range Rovers, the B, C, and D-pillars are blacked out for a "floating roof" effect. As with the 2015 Ford F-150, the body of fourth-generation Lincoln Navigator (and Ford Expedition) was designed as a part of a shift to aluminum body construction, with the use of steel largely reserved for