This bread-and-butter family sedan has one big trick up its sleeve--it's a pleasurable drive for even the most enthusiastic driver. And its agility doubles as an important adjunct to its comprehensive inventory of safety features. The interior spaces are spacious and pleasing, and by and large, its controls and instrumentation are contemporary, straightforward and easy to use. As Mercury's headliner, the new Sable will pamper its occupants during the period of ownership and, thanks to its higher prestige, it should command a higher return at resale time.