How to replace door mirror glass

Hi all 

My driver's side door mirror has got a crack in the glass.

Bought a second hand unit but wondering if I can just replace the glass itself as my casing is in better condition than the replacement I've bought and I'd rather do that than a straight swap 

Is the glass held on by clips? And if I try and take it off will it mutilate the inside? 

Mirror is adjustable from inside, not a normal flag mirror, making it more tricky. 

Thanks in advance. 

AntF 

Thanks very much! Most useful.

It's a tintop, but I guess they're probably the same so I might as well just replace the whole thing. 

Cheers.

A

How to take a flag mirror apart.

Removing the mirror glass from a remote flag mirror. | Volkswagen Owners Club Forum.