Thanks, Sixto, that helps a lot.

So in your picture, is this with just the cap off of the ARV or the housing?
Is there anything behind this flap that I need to look at, too?
It might make more sense once I take it off tomorrow

__________________
Dan
2005 E320 CDI - 246k
1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k
Past: 1987 300D - 264k