So I pulled the instrument cluster out a little (did not disconnect oil) of my brother's 300SD to fix the lights for the speedo, but when putting it back, I could not figure out the order that the bulbs go in on the passenger side of the cluster, besides the left turn signal. Anyone know, or should I try to figure this out by trial and error?

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Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.

Actually decided to pull it all the way out to glue a piece and it has the answer to my question on the back.

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Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.

The fuel gauge and temp gauge were having erratic readings, and the fuel sender had been cleaned recently according to the PO, seeing as these two are bad, should I suspect grounding issues?
Also I noticed on the tach that one of the resistors was cracked, and the tach had also been working rather intermittently, I will replace that resistor but are there any other electrical parts I should replace or should I go ahead and redo all of the resistors and capacitors? In Atlanta there is a very well stocked electrical parts store I can get everything at.
Which brings me to the climate control amplifier, one of the smaller voltage regulators melted, does anyone know if the two small ones have the same value? I plan on repairing the amplifier as well because I would rather not spend $90 for a remanufactured one.

I'm sure there are other relays and amps that need attention but for now these are the important ones.

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Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.