ON THIS MODEL MERCEDES THERE ARE SEVERAL ITEMS THAT COULD CAUSE CONSOLE LIGHTS NOT TO WORK. FIRST YOU HAVE A "DIMMER" SWITCH ON THE INSTRUMENT CLUSTER, SECOND THERE IS A RELAY FOR THE INTERIOR LIGHTING, THIRD THERE COULD BE A FUSE IN THE INST. CLUSTER(DEPENDING ON MODEL YEAR). THE FUSE LOOKS LIKE A BULB SOCKET BUT IT'S RED!