If it's the same as the bulb on a non-air con version it;s a right pain! Basically the entire centre console has to come off, including the gear stick gaiter, hand brake gaiter and the console that reaches as far as the back seats. The Haynes manual pictures are great and very helpful, but unfortunately I have sold my old laguna and sent the haynes with it, otherwise I would email you the pictures.
Toby Aiken, July 2008