The 2005 Mercury Grand Marquis is a full-sized Sedan powered by a 239 horsepower 4.6-liter V8 linked to a 4-speed automatic transmission. The Grand Marquis offers a broad open interior with seating ability for approximately five passengers. Luxury facilities consist of cooling. cruise control. power accessories and a remote trunk release. Security functions include front and passenger-side airbags and ABS brakes ... As