I just discovered that I may have a missing fresh air intake filter missing. This is the one that is located behind the glove box. I unfastened the glove box and let it drop down, opened up the little door and looked inside. Nothing was behind this door as far as a filter. All that I can see is the blower fan for the HVAC! I assume that a filter is suppose to slide right in there?? It looks like it from the supports that are the same height inboard of the opening. Anyone else check and see if they're missing theirs?!?