While both model lines shared a common bodyshell, several detail changes were made by stylists to distinguish Ford and Mercury full-size sedans from one another. While the LTD received an egg-crate grille design, the Marquis was given a vertically-oriented grille (similar to the 1978 Marquis and the 1980 Cougar XR7) and parking lamps similar to the 1975-1978 Marquis; hidden headlamps were abandoned. In line with the previous generation, the Marquis received full-width taillamps (bordering the license plate). In a feature adopted from the Mark series, the Marquis was styled with (non-functional) fender louvers behind the front wheels (and vents in the front bumper). Ford, Lincoln, and Mercury each received its own dashboard design; Mercury received an instrument panel with square white-face instrument bezels. In 1982, the Marquis introduced a digital trip computer (an option, replacing the analog clock in the dashboard).