Hi,
"Ever since I bought my car, it's been making an annoying rattling noise on the right rear side, especially when driving over bumps. I cleaned out and checked the storage boxes to see if anything was loose inside, but there was nothing. I thought that if I had time, I would remove the rear panels, maybe I would find something underneath. Now, the car has had new shock absorbers installed in the rear, and the rattling is gone. I asked the workshop if they noticed anything. Their response was that the right rear shock absorber was completely incorrectly installed. A washer was missing, which caused a rubber bushing to slide downwards." And the previous owner told me: "Yes, it's true, it seemed to me that something wasn't right since the last suspension modification."

Well, he's a friend, otherwise the car is okay, and the price was reasonable.
Best regards.
Florian.