Light in window door panel switch

The light in the window switch on the passenger side of my 2003 S-Type has quit working. Does anyone know how to repair/replace this ? I am hoping it is a simple process, but really doubt that it is - nothing seems to be simple in repairs of anything.

The car is still under factory warranty (45,500miles, 40 months) - unless it's covered under that, I imagine the dealer would want much $ for this type thing. Appreciate any info anyone might provide. Thanks.

I took the Jag into the Dealer yesterday. Switch was burned out - covered under Factory Warranty. However, Dealer had to order part - should be in within a week. At least it's covered.