delete option on fleet vehicles). Following the 1987 model year, the two-door LTD Crown Victoria sedan was discontinued (only 5,527 were sold in comparison to 105,789 four-door sedans in 1987, down from 6,291 in 1986). Demand for two-door vehicles had shifted towards sportier designs (such as the Thunderbird and the Mustang), leaving the compact Tempo as the only 1988 Ford model line sold as both a two-door and a four-door sedan. 1988 update After nine years in the marketplace, the LTD Crown Victoria underwent its first mid-cycle revision for 1988. To (nominally) improve the aerodynamics of the exterior, the front and rear fascias were restyled, rounding the edges of the fenders slightly; while still protruding outward substantially, the bumpers were better integrated within the body. While the roofline and doors were carried over, other changes sought to modernize the design. Coinciding with enlarged taillamps (wrapping into the fenders), the trunklid was changed in shape (with a larger license-plate opening). The grille was lowered in height and widened, integrating the headlamps and turn signal lenses into a single assembly (the Ford Blue Oval emblem was enlarged and centered). The interior underwent a separate revision; the interior received an increase of wood trim (on LX-trim models), redesigned seats, and a more legible speedometer. For 1990, the model line received further interior updates, necessitated by passive-safety regulations. For the first time since 1979, the dashboard and steering wheel underwent a complete redesign (reversing the placement of the audio and climate controls); a driver-side airbag was introduced as standard equipment (for all versions). To comply with federal safety regulations, three-point seatbelts were added to the outboard rear seats. Ford standardized many previously optional features to streamline production costs and increase the market appeal of the decade-old model line, including power windows and locks, tilt steering, and automatic headlights (AutoLamp); air conditioning was no longer a delete option. To further reduce production costs, the LTD Crown Victoria and Mercury Grand Marquis shared a nearly identical interior (with only detail changes distinguishing the two). For its final year, relatively few changes were made to the LTD Crown Victoria for 1991. Ford changed the parking light lenses in color from amber to clear, last seen on the 1979 base-trim Ford LTD. Trim Levels From 1980 to 1982, Ford marketed the LTD Crown Victoria name as the highest-trim version of the Ford LTD. For 1983, Ford enacted an