Find the filter which is under the car, There are special tools required which are cheap at the parts store. They should show you how to use them/
take it off
On a 2001 Mercury Mountaineer : The fuel filter is under the vehicle , below the drivers door , mounted on the frame rail
In the car Duhhh..
The cabin air filter on a Mercury Mountaineer is located on the passenger side of the vehicle. The unit is behind the glove box and can be replaced by removing the glove box.
There isn't one.
The cabin air filter on a 2002 Mercury Mountaineer is located behind the glove compartment. To access it, you need to remove the glove compartment by unscrewing the screws and possibly detaching any clips. Once the glove compartment is out of the way, you can find the filter housing, which can be opened to replace the filter. Make sure to consult the owner's manual for specific instructions and details.
On a 2001 Mercury Mountaineer : Underneath the Mountaineer , below the drivers door , mounted on the frame rail
Its inside the gas tank. connected to the bottom of the fuel pump.
In the front of the engine compartment , on the passenger side , inside the engine air filter housing
go to any auto parts store wheir buy you filter just ask them and they tell you wheir it is at.
check on the frame on the driver side under the vehicle. the filter is located on the drivers side tucked under a frame rail under the drivers door
it doesn't have one