What is this sensor on the driver's side?

It's entirely possible I missed it.
Weird that Audi wouldn't hide a service-related release button.
Looks more like a micro camera to me. I need to adjust my tin foil hat.
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If it's an HVAC sensor, the fact that there's not a corresponding one on the passenger side is also curious and makes me wonder where exactly that side's sensors are located.
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