Does anyone know which is the fuse for the ■■■ lighter on the XF 105.The one it says in the handbook is just a blank socket.
Most problems with ■■■ lighters are not fuses.Check that earth tangs are not bent at base of socket.They distort due to excess current flow and just need bending to make contact with the side contacts on the plug.
No 18 used to kill the limiter on a daf 95 
Does the diagram on the fusebox lid not give any better clues?