300e w124 Instrument Cluster 'Humming' Problem
Gents. I have a weird problem that I've never encountered before. The entire left gauge cluster of the instrument cluster has gone dead except for the lights, and there is a 'humming' sound somewhat analagous to the buzzer that turns on when you put the key in the ignition, but at a much lower volume. When this problem started, the tach also went dead simultaneously. The humming sound completely turns off when you engage the left or right turn signal, but returns once the signal is canceled either manually or as a result of turning the steering wheel. Further more, there is a clicking sound that emanates from the instrument cluster, which sounds like a 'tick tock' of a clock, with the tick having a lower dynamic value (i.e. not as loud) than the tock. I checked the fuse box, all fuses are the correct amperage and are relatively new (less than a year old) and in the correct slots. I can engage the rheostat and it works, however it doesn't 'dim' the lights--at about the halfway point of the turn of the rheostat knob, the lights turn off. I mention this in case anyone thinks it might be the rheostat. Anyone have a clue as to what might be causing this issue? I'm betting this is a known problem that has a super easy solution
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