Hi, all.
I will put selected pages from the manual here to help people out, but, I strongly recommend that you download the full documents from
http://www.nissantechinfo.com/infiniti. This costs $20 a single day access, and you can get all the PDF files for the Service Manual and TSB's from that site in that time - use a high-speed connection to the Internet for best results.
Remember to click on the thumb-nails for larger images:
Replacing the In-cabin Microfilter
2003/2004 M45
2006 M35 and M45