2004 marks the swan song for the Mercury Grand Marquis, as this will be the last model year the vehicle is expected to be produced. The 2004 Grand Marquis is available in two trims – the GS and the LS. Both feature a 4.6-liter V8 that generates 224 horsepower. This four door, six passenger Sedan comes equipped with front and passenger-side airbags, ABS brakes, child safety rear door locks, air conditioning, cruise control, lumbar seats and an adjustable steering wheel. Power equipment includes steering, windows, locks and mirrors.