Loose windshield and A Pillar rattle 2002 e825

Yeah, GEMs rattle a lot but I have noticed a metallic sound banging inside left front A Pillar. It sounds like something large and loose inside when I hit large bumps. Any idea what’s inside it?

In looking I have noticed that the windshield is now loose in lower left front corner. Are they just glued in so a windshield glass place can re-seal or simple enough for a hammer mechanic to fix?

Loose windshield was the issue. I suspect if I had hit something or did a panic stop, glass would have continued down the road. Windshield shop reset with new rubber molding for $150. Much quieter now!