to gray. Interior While not as extensive as changes to the exterior or chassis, Mercury made a number of changes to update the interior of the Grand Marquis in its 2003 redesign. Updated door panels and redesigned switchgear improved interior ergonomics, while the dashboard from 1995 remained in place. A dual media (cassette/CD) player made standard along with a valet key. In the interest of safety, and to keep up with other Ford Motor Company vehicles, a shoulder belt was added for the rear middle passenger and side airbags were introduced as an option. In 2005, due to several mechanical modifications, several changes are made. The steering column is replaced with a non-locking design; a flat-top steering wheel replaces the round-top version used since 1998. A fully electronic throttle moves the cruise control function into the main engine computer. For the front seats, occupant weight sensors were added, which allowed the front passenger airbag to be disabled. An Audiophile 6-disc in-dash CD changer became available as an option on LS-trim models. For 2006, another major change was made as the instrument panel on all Panther-platform cars was redesigned; the optional digital instrument panel was discontinued, as was the use of an analog odometer. While the oil pressure and voltage gauges were removed, a notable addition was a tachometer; the Grand Marquis was one of the last Ford vehicles sold without one. Similar to other Ford vehicles, the new instrument panel features a Driver Information Center (trip computer), consolidating many functions previously seen in the overhead console in between the speedometer and tachometer. In 2007, an auto-dimming rearview mirror was added as an option, along with a full-size spare tire (making its return). In 2009, due to federal regulations, side airbags became standard equipment along with recessed window switches. Trim As part of the redesign, Mercury would change the Grand Marquis trim lineup for 2003. In place of the traditional two-model line, the Grand Marquis was expanded to five. In addition to the base-trim GS, there was now GS Convenience, LS Premium, LS Ultimate, and LSE. Introduced at the Chicago Auto Show in February 2001, and in showrooms by May, the LSE was designated as the LS Premium with a heavy-duty rear suspension, shorter rear-axle ratio, and a 239-hp dual-exhaust engine; it offered 5-passenger seating with leather, dual power bucket seats, with a center console and floor shifter. The 2003 LSE