An Assortment of W124 Electrical Issues:
 

I just picked up an '86 300E with a few issues. All of them at this point are electrical in nature. Automotive electrons and I tend not to be great with each other, but I do know that the fuses are good.

• Right Side Brake lights and running lights. The turn signals and reverse lights work, but not the others. Hmm... Bad input?
  
  Sunroof: The motor draws enough power through the switch to dim the headlights. Where are common places for them to jam? If I can't sort this one, I'll just silicone the thing in place to kill the wind noise. The PO also yanked the sunroof liner, causing me to think of asking a redneck to install a pop-up glass piece.
  
  Lastly - the cluster lights "just went dead" according to the PO. Where do I start?
  

Thanks for your responses!

If trhe fuses and bulbs are good, chances are the control module in the fuse box has failed. It is the longest unit in the fuse box.

The sliding tilting sun roof is not something easily diagnosed without seeing it.

The dash lights could be the dimming rheostat on the instrument cluster.

since the car is 20 years old change all the fuses...i don't care if they look ok or not.

it will only cost a few dollars and a few minutes.

Yes, and people always comment that they look good, when they are actually blown.

So sly...... I'll get on that one right away!

Yeh, I guess fuses could be an issue. For as well designed as most european products are, they let the world down in the fuse department. You couldn't come up with a worse design.