This happens when just moving from still, worse when going back and in turning.

I went 3x to the dealer for this. They diagnosed a part related on the top of the front suspension. They first retorqued it and then later changed a bushing or something.

It was never fixed. I know that it is not normal.

Then when changing oil, I found trapped on the engine cover underneath the engine a bolt! Looks like M10 x 35mm.

For the record, in its first year on the road, a previous dealer performed a technical service for a very different issue; it was a rattle coming from the dash. I was told that they had to remove the steering column and had even to realign the car. I can't help thinking that this bolt could come from that repair and cause the second noise.

Any specialist who can tell me where this bolt belongs?