Air Filter?
pop the hood, pull off the weather stripping on the Pass. side of the firewall, lift flap, replace filter. Easy to understand when you're looking at it. Let me know if you need more help.
I just did mine today and put one of those air freshener pads on the new one when I put it back in. (had a similar issue. mine smelled like wet dog though)
If you lift the hood and look over on the passenger side, lined up pretty close to the glove box; there'll be a white-ish clear square about 1"x5" right below the wipers. If you lift the molding up... its almost directly under that square. I'll get a picture in the morning. There're two little thumb clips in the front that hold it in. Pop those and it lifts up and slides out. Took me 3 minutes.
If you lift the hood and look over on the passenger side, lined up pretty close to the glove box; there'll be a white-ish clear square about 1"x5" right below the wipers. If you lift the molding up... its almost directly under that square. I'll get a picture in the morning. There're two little thumb clips in the front that hold it in. Pop those and it lifts up and slides out. Took me 3 minutes.
Im gonna order the hepa-filter thing... 
My allergies make my nose run onto my pocket protector. Joking aside though, people take for granted the difference in comfort in the car when you have cleaner air to breath on a joyride on a nice day (If you don't have your windows down. I usually do unless its a scorcher day. The A/C in my TT blows really cold air, but it somehow still doesn't cool the cabin very well -shrugs-

My allergies make my nose run onto my pocket protector. Joking aside though, people take for granted the difference in comfort in the car when you have cleaner air to breath on a joyride on a nice day (If you don't have your windows down. I usually do unless its a scorcher day. The A/C in my TT blows really cold air, but it somehow still doesn't cool the cabin very well -shrugs-
Sorry, took longer than I expected to get the pictures. here ya go. if anything... this can be referenced if anyone else needs to know -shrugs-
With everything still in place

Lift up the molding and plastic cover and you can see the filter (I have a blueair freshener pad sitting on top of mine in the picture)

Another view
With everything still in place

Lift up the molding and plastic cover and you can see the filter (I have a blueair freshener pad sitting on top of mine in the picture)

Another view


