GoodRevs

Turned the A/C on in my fathers white ES yesterday and it stunk of mold. It was getting bad last summer but this summer it's awful. I'm guessing it's the filter but I have no idea where it's located on the 4ES's and I don't have my Haynes manual with me. Can anyone briefly explain where it's located, how to change it and which filter to buy? Thanks

EDIT: Went ahead and swapped out the cabin air filter located behind the glovebox. The air is now much fresher, no more mold.