The 2006 Mercury Mariner is available as a 4-door, 5-seat sport utility. Starting at $21,380, the 2006 Mercury Mariner Convenience (100A) FWD is powered by a 2.3L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 26-mpg on the highway. The top of the line 2006 Mercury Mariner Premier (330A) 4x4, priced at $26,785, is powered by a 3.0L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 23-mpg on the highway.