Okay, something strange happened. The lights for instrument cluster stopping coming on. All struments work fine. All external lights (head lights, tail lights, etc, interior lights, cig 12v) work fine. But the lights for instrument cluster (speed, rpm, gas, water temp, radios, climate dials, and 3 other vdo gauges for M model) stopping coming on. I've checked fuses under fuse box 1 (driver's side under the hood) and they are checked out.

Does anyone have any idea where to look into? It seems to be a simple problem and I just ran out of ideas.