Strip on top of my 2000 E320
Oh, and did I mention I'm a little thrifty, too?

Those strips are attached from the underside of the roof. You'll have to remove the pillar coverings and then the headliner to access the fasteners. At that point you can inspect to see if any corrosion has occurred or if you just need to tighten the fasteners.
There was a DIY awhile back by someone who removed their headliner to recover it. Very detailed with lots of pictures. Sorry I can't recall the poster but someone else might. Or you might search on 'headliner'.
Good luck.



