Bad Light over Tachometer
There's two bulbs on top that are a bit bigger than the rest that illuminate the cluster. Turn the black "knobs" holding the bulbs 90-180 degrees until you can pull it out and replace the bulb in the "knob" holder.
See pictures here...
http://ow.no/mb/w124/tech/pictures/
Check under center console/dash for cluster pictures.
Disturbing the cluster will inevitably cause other (old) bulbs to blow.



