Where is the Air cabin filter located on a Ford 500 My air conditioner isn't on 2007 Ford Five Hundred

The Air conditioner isn't leaking Had it checked and was full of freon. They suggested changing air cabin filter.

Asked by for the 2007 Ford Five Hundred
I have a 2005 500, there is no cabin filter. Normally it would be behind the glove box but a decision was made somewhere not to install one or even complete the opening. Go to http://www.fordtaurus.net/forums/viewtopic.php?f=5&t=10615 and you can find out how to make the opening and what type of filter to use.
2 answers 2 comments
Who's 'they'? How was the charge level verified? Some after-market cabin filters come with instructions , and if you get it at a dealer ,they might be able to give you a print-out of the parts break-down , which may be helpful.
They is a auto mechanic. Thanks
never mind.Good luck.