The dash display light went out the other night. Any ideas how to repair this?

I have 2 ideas: be more specific, and do a search and find 100s of posts about dash illumination problems and fixes.

__________________
2005 Mercedes C230k sport sedan, 6 speed
1987 Porsche 924S - 968-engined track car

Well.....

Only one light is out?

only one of the lights? which one? the instrument panel? ac? radio? shifter? window switches??

__________________
Car which i own - 1987 Mercedes Benz 300e shown here http://www.cardomain.com/memberpage/790052

I turn on the headlights and the dash; speedo & engine gauge panel dosen't light up. I don't know if its one or several bulbs. I don't know where the bulb(s) are. i.e do you need to take out the whole gauge panel or is the bulb somewhere you can get to and replace. I don't know how much more to explain this. When you look at the speedo at night you can't see it. I don't notice if this effected the radio illumination everything works except the light.

1994 E-320

This genius just adjusted the reostat. I haven't driven the car at night for sometime and must have turn down the dimmer when I reset the trip. Thanks for the comments.........