Surfaces are soft to the touch for a luxurious feel. No seams are visible where the passenger airbag resides. Electroluminescent lighting enhances the white-faced analog gauges, which are surrounded by a thin chrome bezel. Stylish typefaces give the gauges a classic look. A neat white clock in the center of the dash continues the classic theme. Major controls use large twist dials that are easy to operate. The 300M Special comes with a nice wood steering wheel that feels good in the hands.

The bucket seats are supportive, trimmed in leather, and heated. Personalized memory controls allow two different drivers to always find their favorite seating positions. Steering wheel audio controls manage a seven-speaker Infinity stereo. An optional six-disc CD changer comes mounted in the instrument panel. Rear seats are roomy and comfortable.

Because the 300M is built on a shortened Concorde body shell, it does not share the Concorde's enormous trunk space. But at 16.8 cubic feet, the 300M's trunk is still plenty large, and usefully shaped. Trunk hinges are designed to not intrude into the cargo space when the trunk lid is closed

Safety features include front air bags, child-protection rear door locks, upper interior trim impact protection and an inside emergency trunk release. Side-impact airbags ($390) are optional. 300M comes standard with ABS (anti-lock brakes) and traction control. The doors lock automatically once underway (though they can be programmed not to do this). Child seat-top tether anchors are provided on the rear shelf panel. An anti-theft system is standard.