S-Class (W222) 2014-2020

What is this sensor?

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Old Today, 12:04 PM
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S-560
What is this sensor?

Hi all!
What is the nub sensor at the bottom of the rear window? Can I put a decal in front of it (like a University decal kinda thing)? Thanks much in advance!
Cheers,
Nick

Old Today, 03:25 PM
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2016 S550, 2015 Honda Civic Hybrid
Good question ... you often see a sun sensor in the front windshield area ... used by the A/C system to read and compensate for bright sunshine.
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Old Today, 03:40 PM
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Its probably a light sensor for the auto dimming mirror. I wouldn't block it.

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