GLC 250 BLACK BAR AT REAR OF ROOF LINING

Tims28

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Hi guys and gals, new to this thread as I just bought my GLC recently. I was wondering, there is a black bar (about 15cm long) attached to the rear area of the roof lining, (roughly above middle rear passengers head) looks like a light to me, but doesn't come on, Does anyone know what this is ???
 
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Tims28

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Update, I took down this black bar and it had three wires attached to it. I still don't know what it is. Possible a radio antenna ???
 
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Tims28

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UPDATE: I figured out what this black light bar does. It's indicator lights for the reversing sensors. FML. How stupid. It only comes on when reversing and when the beeps are going off to warn of obstruction. (can only be seen in your rear view mirror, or if you turn your head 180 degrees). This is why it took me so long to figure out. Figured it out by accident, one day while reversing, I decided to look in my rear view mirror (normally I don't) and I see the lights. so there you have it. Finally solved.
 


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