People who buy full-size, rear-wheel drive sedans such as the Mercury Grand Marquis are probably not looking for breakthrough styling and innovation. They tend to be older owners who have settled comfortably into their lives and who want roomy, traditional cars to match their laid-back lifestyles. The 1994 Mercury Grand Marquis LS fits the bill, competing for these buyers with other full-size sedans such as the Chevrolet Caprice, Ford Crown Victoria and Buick Roadmaster. The Mercury Grand Marquis has been a quiet, solid sales performer for a number of years. Lincoln-Mercury has used it successfully as a niche car, offering buyers Lincoln-like room, comfort and luxury for a reduced price. Our test Grand Marquis LS was a contemporary example of this philosophy. Completely equipped with a variety of comfort and convenience options, it had a sticker price of $24,685, including destination charges, minus $1,755 in special discounts. Not bad, and very comparable to the 1994 Chevrolet Caprice LS. In fact, after our evaluation of the Mercury, we'll give a quick apples-to-apples comparison of these two luxury sedans.