Interior lighting in '72 280se 4.5

[Curkey]

All of my exterior lights work but as far as I can tell only two interior lights are working. The one on the knob for the rear defrost and the one near the floor by the pedals. I Know next to nothing about how a cars electronics work so please explain in simple terms.

[Rauchen]

start with fuses and ground connections. The electronics on this car are not difficult when it comes to the lights. Did they all of a sudden stop working or did you get the car like this?
The fuse panel should be under the driver side dash, about where your left knee would be.

[124Coupe]

Also try rotating the dash light rheostat back and forth a number of times. It's the left knob in the instrument cluster.

[Curkey]

Thanks for the info I will check the fuses. I bought the car with the lights working as they are. I had no idea they didn't work as I bought the car on a sunny afternoon and it never occurred to me to check the interior lights.