I would pull cluster and check if you have one the red socket type fuses on back of the cluster, they look like one of the black light bulb sockets from the back but it is red and it is a fuse. I know 124 have one, not sure about others. If that blows you can lose lighting.

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2005 Mercedes C230k sport sedan, 6 speed
1987 Porsche 924S - 968-engined track car