two-door hardtop receiving a different roofline from the Ford LTD. 1969-1972 For 1969, the Mercury full-size range was redesigned (alongside its Ford counterparts); the Marquis remained a counterpart of the Ford LTD model range. Alongside the addition of four-door sedans, the Marquis line gained a station wagon, as the Colony Park woodgrained station wagon was integrated into the model line. While the Marquis four-door shared much of its roofline with its Ford counterpart, the two-door hardtop was given its own roofline. The front fascia of the Marquis adopted many elements from the Lincoln Continental, including its hood and grille proportions and chrome-topped fenders; the Marquis, LTD/Galaxie/Custom, and Continental each received their own horizontal taillamp design. Initially sharing its hidden headlamps with the LTD, the usage of the design largely became exclusive to Lincoln-Mercury flagships after 1970, including the Marquis, Lincoln Continental, and Mark-series (the LTD Landau became the only Ford to use the configuration). The system was vacuum-operated, closing the headlight covers using a vacuum canister powered by the engine; as a fail-safe. the system was designed to retract the headlight covers following any vacuum loss. For 1970, the Marquis saw few visible changes to the exterior and interior. In compliance with federal safety regulations, all full-size Mercurys received a new steering column, with a rim-blow steering wheel replacing the previous horn ring design. Alongside the woodgrained Colony Park, a Marquis station wagon (without wood paneling) was introduced. For 1971, the Marquis underwent a revision of the exterior and interior; the convertible body style was dropped (along with the Marauder fastback). Distinguished by the elimination of vent windows and framed door glass (for sedans and station wagons), Mercury saw the introduction of the "pillared hardtop", a sedan combining a thin B-pillar and frameless door glass (to mimic the appearance of a pillarless design). The revision also included the use of fender skirts and wraparound taillamps. The dashboard underwent a redesign, clustering the instruments and controls closer to the steering wheel. For 1972, the grille shifted to an egg-crate design (with a similar panel between the taillamps). In line with federal mandates, the Marquis adopted seatbelt warning buzzers. For the first time, the model line introduced a power sunroof option (requiring the selection of a vinyl roof). 1973-1978 For 1973, the Marquis underwent an extensive mid-cycle revision. Largely coinciding with the addition of 5-mph bumpers for the front and rear fascias,