Hi. I have been driving my old (now moms) W126 for the past three days as my work car is in the shop and tonight I noticed that the light that illuminates the headlight switch is not coming on now. I am assuming that the bulb has given it up after 22 years of use? Also wondering how difficult this bulb is to replace and how? Really not a necessary light, but looks funny now with it not illuminating. Its a '88 W126.

Thanks!