The 2004 Mercury Mountaineer does not have an automatic transmission fluid dipstick . I know that the 2002 and newer Ford Explorer four door versions do not have a dipstick for the automatic transmission fluid level .
According to the 1997 Mercury Mountaineer owners manual : Your 4R70W automatic transmission takes ( Motorcraft MERCON automatic transmission fluid ) * the type that is used should be engraved into your automatic transmission fluid level dipstick *
Starting with the 2002 model , there is no automatic transmission fluid dipstick on the Mercury Mountaineer ( and the Ford Explorer , 4 door )
Your 1997 Mercury Mountaineer came from the factory with ( Motorcraft MERCON automatic transmission fluid ) in your 4R70W automatic transmission ( the type that you are supposed to use should be engraved in your automatic transmission fluid dipstick just to confirm )
Motorcraft MERCON - V , automatic transmission fluid in the automatic transmissions
Motorcraft MERCON V - automatic transmission fluid - according to the owners manual
The automatic transmission takes Motorcraft MERCON - " V " - automatic transmission fluid The transfer case takes Motorcraft MERCON - automatic transmission fluid
On a 1998 Mercury Mountaineer : Using a funnel , add the automatic transmission fluid through the automatic transmission fluid dipstick tube . It is located near the firewall , just to the right side ( passenger side ) of the engine , where the transmission is bolted to the rear of the engine . ( the type of transmission fluid to use should be engraved into the dipstick )
According to the 2009 Mercury Mountaineer Owner Guide : ( Motorcraft MERCON - V , automatic transmission fluid is used as the power steering fluid )
According to the 1997 Mercury Mountaineer Owner Guide : ( the 4R70W automatic transmission used in two wheel drive and all wheel drive versions takes Motorcraft MERCON automatic transmission fluid ) * the type used should be engraved into the automatic transmission fluid dipstick *
According to the 2009 Mercury Mountaineer Owner Guide : ( Motorcraft MERCON-V automatic transmission fluid is used as the power steering fluid )
Motorcraft MERCON automatic transmission fluid ( 2.64 pints / 1.25 liters ) is used in the transfer case of a 1997 Mercury Mountaineer