Citroen XM Forum

I suspect he glass has come out of the runner and is jammed. If you reach round the glass at the bottom edge, in the centre, there is a nylon C-ring that holds the glass onto the drive guide.
pull the C-ring off and push the glass off the drive guide, then you should be able to lift it int he guides, if not, it has jammed.

Sold, thanks for all your help.

Great! ..I hope to someone who will look after it. it's probably the only XM in the country in that colour.

That is good news and hopefully it has gone to an enthusiast and may be seen at future rallies! With regards, Matthew T.