I believe there are quite a number of W126 owners here and I hope to increase the knowledge base of this classic, remarkable car
This is a pic of my engine bay:

My battery is undersized from what I know so will change it to a DIN100 unit once the current 65mAhr Hyundai battery dies on me
I have stripped open both the A/C wood trim and gearshift panel to change out blown #74 bulbs:

This is so as to achieve full OEM light output as so:

Only my air flap control knob is not lit up as there is something wrong with the control unit which warrants further troubleshooting. Supposedly the hazard light switch should be in the center cavity. Will be putting it there in the future.
No idea why the driver window switch is so brightly lit compared to the rest!

The headlight switch should light up as well:

The knob will only light up when the fog lamps are on.
My new steering wheel (OEM with zebrano wood trim) that I am expecting shortly:








































