How can i change the cabin air filter on a Lincoln Navigator 2004

I believe this vehicle does not have a cabin air filter. There is only a mesh that prevents contaminants from entering the blower motor but it is part of the vehicle and isn't replaceable.

This link is for 2002 Lincoln it is under the hood.
All of the cars I have change was behind the glove box but they were all GM. The link for 2000 navigator says there is no cabin air filter.
https://www.youtube.com/watch?v=XtOa7zFUOH0
Found 2000 Lincoln link which says no cabin air filter on 2000.
https://www.justanswer.com/car/2pjax-cabin-air-filter-located-2000-lincoln-navigato.html

Our research indicates that your vehicle does not have a cabin air filter (also known as a pollen or AC filter). Vehicles without cabin air filters typically have a plastic mesh that prevents leaves and other foreign objects from entering the HVAC system. This mesh is part of the vehicle and does not need to be changed.

For instructions go to www.micronAir.com you can print ut the instructions.
If you go to micronair.com and try to find the instructions for changing a lincoln ls cabin filter you will be disappointed because the lincoln is not one of the cars found on this list. A general search of lincoln ls & cabin filter will yeild many results with the pertinent information.
Once on www.micronAir.com, click on the US section at the top of the page.
There you will find Lincolns. I did.

it will be behind the glove box .
Open the glove box push in on the sides and the glove box will come out the bottom hinge will hold it on behind that. There will be a plastic cover with 4 plastic tabs push them in pull the cover off and there is your Cabin Air filter.
there should be a diagram in your owners manual.
if this was helpful please give it a thumbs up to help others.

I dont think your car has a air filter for the cabin

You will have to remove glovebox and possibly dash panel to access the cabin filter compartment. Once you get the screws out and open the door, you then can pull out and exchange the filter

The most common 2 places for a cabin air filter on ford trucks is under the black plastic under the passenger side windshild wiper or behind the glove box

Normal Maintenance Details
90,000 Miles (144,000 Kilometers) : All Applicable Models
PERFORMED OPERATION COMPONENT
INSPECT BALL JOINTS
If equipped.
INSPECT BRAKE SYSTEM
Inspect brake pads, shoes, rotors, drums, brake lines & hoses.
INSPECT COOLING SYSTEM HOSES & CLAMPS
INSPECT DISC BRAKE PADS & ROTORS
INSPECT DRIVESHAFT
If equipped.
INSPECT DRIVESHAFT/PROPELLER SHAFT U JOINTS
INSPECT EXHAUST SYSTEM AND HEAT SHIELDS
INSPECT PARKING BRAKE SYSTEM
INSPECT STEERING LINKAGE
INSPECT SUSPENSION COMPONENTS
LUBRICATE DRIVESHAFT/PROPELLER SHAFT U JOINTS
LUBRICATE STEERING LINKAGE
REPLACE AIR CLEANER/ELEMENT
REPLACE AUTOMATIC TRANSMISSION FLUID
REPLACE CABIN AIR FILTER
If equipped.
REPLACE CLIMATE-CONTROLLED SEAT FILTERS
If equipped.
REPLACE ENGINE OIL
REPLACE ENGINE OIL FILTER
REPLACE FUEL FILTER
ROTATE TIRES
90,000 Miles (144,000 Kilometers) : RWD
PERFORMED OPERATION COMPONENT
LUBRICATE BALL JOINTS
2000 Lincoln Navigator
Maintenance
...sorry if not too readable