Howdy,
There is a tiny lightbulb behind the light switch knob. I pulled off the knob, and bought a new light bulb. A tiny little sucker. Still, it does not work when I turn on the lights.

Every single instrument light bulb works in my DD, except this one.
Any ideas ?
W123 Chassis Application, and in particular, body is a 240D 1983 flavor.
Thanks in Advance