Do the rear deck vents actually send out air? The reason I ask is that one morning I noticed it was taking a while for the back window to defrost, but then I found that there seemed to be no air coming from the vents. If anyone knows the answer to this, thanks in advance.

 

no air really comes out.. not air powered by the AC unit.. some air does from the trunk i believe.. but the rear window defrosts because of the defrost lines on the back window..