mirrorwhat

  1. T

    This thing on the front of my RV mirror...what is it?

    Could someone please tell me what this thing on the front of my 1998 E280's rear view mirror is for please. It looks like some sort of sensor / LED but it never seems to do anything. I'm attaching a picture with an arrow to show what I'm talking about...apologies for the the poor quality but I...
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