I might try replacing the fuses anyway, even if they look good. My lights, then my instruments, worked intermittantly until the day I heard a buzzing from the dash, and the lights and instruments raoidly flipped on and off. Turned ouit to be a hairline crack in a fuse that let the fuse sometimes work, sometimes not. Replaced fuses and the problem went away.
2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)
Click to see 87 300E