How I made my instrument cluster so bright I actually need the dimmer...

[Shortsguy1]

My w115 was plagued with the fairly common problem of dim instrument cluster lighting. So this is what I did to fix it, keeping everything original.

1) I cleaned the glass thoroughly
2) I painted the inside of the cluster with gloss white spray paint. I even painted the circuit board where possible.
3) I replaced every bulb
4) I cleaned out any corrosion from the rheostat.

These four things made a remarkable difference. If you are bothered by dim instruments, this was an inexpensive solution. It did take a bit of time because I fixed my clock, restored my steering wheel, and fixed my column-shift gear indicator at the same time, but it was a fun winter project.

If you ever want more details, feel free to ask.