You have short circuited your cigarette lighter circuit and the fuse has gone. Check for dodgy chargers/plugs you might have used with it, check for foreign objects in the sockets and then replace the fuse in the left side of the glovebox, behind a panel that you pull towards you.
Well I did use an air inflator via the cig lighter and after that it did not work, so seemsyou are right. Only thing is I can find the cig lighter fuse, there is a pic but the place where is would go is empty, any ideas.
Do you know what the big square fuse is at the top of the panel?