Hello guys - new here - long time BMW owner, have an E28 M5 and a 07 E61 manual that I have spent the entire weekend bailing water out of the battery tray cargo well etc and unclogging sunroof drains (will post some vids/pictures). Anyway - I did have it in dealer (CPO but my warranty seems to cover nothing) and when I returned after declining all of their over-priced estimate, I found a part in my (messy) cargo area. Not sure if it is from my car or not, never seen it before. Anyone have a clue (the black beam with the cross-bracing)?