If there is a short and disconnecting all those lights and other components doesn't locate it perhaps a close look at the wiring is in order. Take one at a time and make sure the hot lead wires aren't grounding. This is the most common problem because the loose wiring around components is most subject to wear.

I wouldn't jump ahead by thinking that the issue is the instrument panel.

__________________
84 300SD
85 380SE
83 528e
95 318ic