Inner mirror rattling

Hi mates, my inner mirror makes very annoying rattling when I drive between 2000 - 4000 revs. When I touch the mirror, rattling stops. It seems like something inside the mirror makes the noise, the glass itself seems to hold quite firmly. Does anybody know how to solve this problem? At least how to demount the mirror? Thanks.
 
I only know how to remove the cup mirror, not sure if it's the same on a FF with all that auto stuff on it.

On the glass is a grooved lug bonded on, the mirror just slides up this lug to remove and slides down it to refit.

Don't try and twist it or just pull you may crack the screen.