Which ones?
According to the 1999 Mercury Grand Marquis Owner Guide : # 16 is a ( 20 amp fuse ) for the cigarette lighter
According to the 1998 Mercury Grand Marquis Owner Guide : ( 71.9 litres / 19.0 U.S. gallons )
( 20 U.S. gallons )
According to the 2007 Mercury Grand Marquis Owner Guide : ( 19.0 U.S. gallons / 71.9 litres )
Should be 4x6. 3x5 is the other size.
You can view the 2002 Mercury Grand Marquis owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( page 63 has the list for the type of bulbs used on a 2002 Mercury Grand Marquis )
front 6x8 back 6x9
The Mercury Grand Marquis is a nice big car, especially those from 1986, very roomy for those who are tall, with long legs. The original tires size for this vehicle is 215/70-15. There is no other size suggestions for this vehicle.
According to my Chilton's Auto Repair manual : A ( 1987 ) Mercury Grand Marquis has a ( 20 U.S. gallon gas tank )
71.9 liters ( 19 U.S. gallons )
The 1998 Mercury Grand marquis has the 4.6 liter / 281 cubic inch Single Over Head Cam ( SOHC ) engine from the factory