what is the vent in the center of my dashboard on my s60 for? I cannot seem to find it in the manual. Looks like a speaker but no sound comes out of it?? It is the big square vent in the middle of the dash. Thank you..

 

It is the location for the optional pop up navigation screen and speaker. But because it wasn't smart to create 2 separate dashes for the S60, ones that don't have the navi just have the cover. It's just a cover.