DB9 - Metallic rubbing noise

[cuddapah]

2015 DB9 ... bought it new. I noticed wind noise coming at the side view mirrors. After adjusting seals and something else, the wind noise went down a little bit. After adjustment, I noticed some metallic rubbing noise coming from passenger side. It is very loud when driving on rough surface. Dealer tried to fix which didn't help. I am not able to figure out from where it is coming from - but it sounds like some metal parts are rubbing. Doesn't effect performance except giving me headache. Any thought on the noise ?