According to the 2004 Mercury Grand Marquis Owner Guide :
( " regular " unleaded gasoline , 87 octane )
headlight relay location on a 2004 mercury grand marquis
how do i replace a passenger side headlamp for a 2004 grand marquis gs
According to the 2004 Mercury Grand Marquis Owner Guide : ( 19.0 US. gallons )
It is inside the fuel tank, removal will require access to the top of the fuel tank.
2004 mercury grand marquis fan stop working
According to the 2004 Mercury Grand Marquis Owner Guide : With engine oil filter change : ( 6 quarts )
the best fuel would be 91 octane or premieum.
My 2004 Grand Prix GT2 runs on 87 octane just fine.
On a 2004 Mercury Grand Marquis : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
According to the 2004 Mercury Grand Marquis Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts of 5W-20 )
2004 grand marquis blowing cool air cant get hot air why?
The cabin air filter, in your 2004 Mercury grand Marquis, is located behind the dashboard on the passenger side. The air filter is directly behind the glove compartment.