Is there anyone who has experienced a "clang clang" noise near the B-pillar when starting or braking with the 2023 C11 hybrid?

Check your seatbelt.

It's the sound of the plastic panel on the inside of the rear door resonating with the metal, right? [I want to be quiet] I had that kind of hissing sound too. Went to after-sales but it wasn't completely resolved, so I ended up buying some rubber strips myself to fix it.