The 2000 Mercury Mystique is a 4-door, 5-seat Sedan, available in 2 trims, ranging from the GS to the LS. Upon introduction, the $16,240 GS is equipped with a standard 2.0L, 4-cylinder, engine that achieves 24-mpg in the city and 34-mpg on the highway. a Manual transmission is standard. The $17,540 LS is equipped with a standard 2.5L, 6-cylinder, engine that achieves 20-mpg in the city and 29-mpg on the highway. a Manual transmission is standard.