The switch cover to the middle knob just clips off, you pull out the green optic thing and you can see the tiny bulb deep in the hole in the middle of the knob. You need very long thin nose pliers to pull the bulb out or you can be clever and use some thin flexible tube to push over it and pull/suck it out, takes 2 min. I did it the hard way by taking the surround & ashtray all out and then dismantled the switch from the back, took 20 min. Thought I'd been clever, then my son, who is a VW techy showed me the proper way........doh!!!!!!!!! :embarassed: