The 2004 concept Lincoln Mark X (pronounced Mark 10) was based on a "Lincolnized" 2004 Ford Thunderbird body design and chassis, with a folding hard top replacing the Thunderbird's convertible top and optional one-piece removable hard roof. It introduced the new fine lace-like "egg crate" chrome grille configuration characteristic of future Lincoln vehicles, though it shared some of its other design elements with the MK9.
The Mark X concept model features a convertible panoramic glass roof. The interior was also based on a "Lincolnized" version of that in the standard Thunderbird (which in turn is derived from the Lincoln LS) - which differentiates it from the MK9 interior. The Mark X's interior is, according to Ford Motor Company's press release, "dressed in Lime Sorbet with white Corian accents, polished aluminum, dark chrome, natural grain leather seating surfaces, plush sheepskin flooring and tailored tone-on-tone stitching throughout. Its four-spoke, power-adjustable steering wheel also is leather wrapped."
The Mark X is 185" long, features 12" chrome alloy wheels, and 3.9 L V8 with 280 hp.
The Mark X is not to be confused with the MKX, which is pronounced "Mark Ex," the "X" designating the vehicle's presence in the "crossover" segment.