The 4.0 liter SOHC , V6 , has ( 3 ) timing chains and the 5.0 liter V8 has ( 1 )
timing chain , if that's what you are asking ?
There are two head gaskets in the V 8 1999 mercury mountaineer
There are seat belts for ( 5 ) people
( 5 quarts ) with engine oil filter change
the four door speakers are 6x8 and the sob if you have one is 8"
According to the 2004 Mercury Mountaineer Owner Guide : ( 22.5 U.S. gallons )
( 6 ) if you have the 4.0 liter SOHC , V6 engine and ( 8 ) if you have the 5.0 liter , V8 engine
Two.
According to the 2007 Mercury Mountaineer Owner Guide : ( there are 5 lug nuts per wheel )
4
22.5 gallons
According to the 2000 Mercury Mountaineer Owner Guide : ( the gas tank holds 21.0 U.S. gallons )
I believe it has ( 2 ) because the ignition system is EDIS ( Electronic Distributorless Ignition System ) on the 2002 Mercury Mountaineer V8