Just a little piece of information..... My clock and computer light went out as well about 2 years ago. I replaced them (along with all the other lights, speedo, tach, etc...) with Track Auto lights and they haven't burnt out yet. The cost of the lights from the dealer prompted me to do this. Also don't let the dealer try to tell you that Track Auto lights won't work because of voltage, it's simply not true. They work perfectly fine in my car, and you can't tell the difference from the other factory lights (the factory ones actually remaining that is). Also here is a web site that will walk you through the process of removing the dash to replace those lights... Good luck....

http://www.volvospeed.com/Dashremove.htm