I had a pair of Bang and Olson's which measure 36"x17.5"x15".. They were still in their box and they fit right in next to my Bowling bag which is a 4 ball roller. Was no problem getting them in or out.... I would suppose you could fit in a bigger pair. I had an executive deski, about 60"x32"x30" and it fit in as well... I had to fold the seats down but was still able to close the hatch.
the four door speakers are 6x8 and the sob if you have one is 8"
The sub woofer size on a 1999 Mercury Mountaineer is 5 inches by 7 inches. Speakers are located in the front and the rear of the vehicle.
5x7 in both front and rear doors.
According to the 1997 Mercury Mountaineer Owner Guide : The 5.0 liter V8 engine takes the ( Motorcraft FL-1A ) engine oil filter
8"
Actually , the first model year of the Mercury Mountaineer sport utility vehicle was 1997 and if you open the drivers door , on the end of the door you will see an information sticker that will show the size of the tire that originally came on the vehicle
See sources and related links below to lookup bulbs for any year mercury mountaineer.
On a 1997 Mercury Mountaineer : It came from the factory with either the Motorcraft BXT-65-650 battery ( or the optional Motorcraft BXT-65-850 battery ) ( that's BCI group size 65 , 650 or 850 cold cranking amps )
On a 2007 Mercury Mountaineer : Open the drivers door and on the end of the door ( or the latch pillar ) you will see an information sticker that shows the original size tires on the vehicle from the factory
6.5 inch round speakers
21 U.S. gallons ( 79.5 liters )
The front speakers in a 1997 Mercury Grand Marquis measure 6 inches by 8 inches and they are located in the front door. The rear speakers measure 6 x 9 inches and are located in the rear deck.