engine compartment

hello dear forum members. I attached the video of my problem. It is the rattling noise when starting engine, switching it off, going over the bumps, pressing and releasing the clutch aggressively, pressing and releasing the acc. pedal in low revs..... I am experiencing this problem since my...

when I had the bonnet off I noticed some loose fabric type material just above the nearside drive shaft. Any idea where it should be and how hard to put back? I guess this is some sound proofing material and that a clip(s) has broken. Cannot see the offside drive shaft as too many...