ist thing to to is remove the side panel to access the corner of the dash trim:
once that is removed, you can grab the edge of the dash trim piece:
from here, you can pull on the edge of the trim piece & air vent & the clips will start to pop off:
here is where is gets tricky: the way the trim piece clips in, you have to pull very carefully to get it off the car. i found pulling up then down got the upper & lower clips off. this was one of the toughest parts.
in this pic, you can see the slots that the tabs from the trim piece fits into:
what sucks is that the bezel that surrounds the radio can be removed without getting this mazzive trim piece off, but the clips are soooo tight, and there is no place to get a grip on the bexel piece to remove it by itself.