Sam14GS,
After looking at your Link, I noted there's supposed to be a Vent somewhere on the Headlight Assembly.
I went out to my car and searched for a Vent, couldn't find anything other than what I've circled in my
Photo below.
I thought that maybe it was a Screen over an opening to vent the Headlights, so I got out my Small Shop-
vac to try and clean the screen.
The Shop-Vac was unable to pick anything up off of the screen, so I looked at it a little closer.
I ended up taking my Utility knife and lifted a corner, then decided to pull it off.
It actually was just a piece of Tape over what looks like a Vent.
After looking online at the different Headlight Assemblies available for the Regal, I noticed that they all
have that piece of tape over that vent!
The Holes in this vent are too large to leave as is IMO, so I'm going to find some Screen to cover the vent
to keep larger objects out of the Headlight Assembly.
No, it won't keep water out and maybe that's why they have it taped?
It could be that this vent was their attempt at exhausting the condensation and it failed, who knows?
But why else would it be there?
I'm going to give it a try by leaving the Vents Open with a piece of screen over them!
This should still allow air to circulate but keep bigger objects (like bugs and spiders) out of the headlight assembly.
Only time will tell, but I'm willing to give it a try.
I can always put a piece of tape back over the Vents!