here goes
like many others my lighter socket did not illuminate don't think any mk4's do
I bought a
mk3 ibiza illuminated one from the stealers for about £5 so that the red illumination is the correct colour
stick your finger into the lighter socket and bend/hook your finger then pull and the old lighter socket comes out with wires attached by spade connectors
plug the spade connectors onto the new mk3 lighter socket, then find the wire that illuminates the traction controll button lamp (this is ignition switched and can be seen through the hole where your lighter socket was) and connect a new wire to this and connect it to the mk3 lighter socket illumination bulb
the mk3 lighter socket will insert into the hole where the original one was but it will need to be carfully inserted by inserting/clipping in the illuminating ring first then inserting/clipping the lighter socket into that
does that
help?