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In the image below, what does the small round grate looking object do? It is directly below the ignition switch near the steering wheel. Is there a sensor in behind or something?
Have you ever smelled your keys? They have a rather unpleasant metallic smell. Since this car doesn't have KEYLESS-GO, you will (probably) have a key chain of other keys on your car key, and they will dangle below. That hole is connected to a inhaler that sucks the smell into the dashboard and then out the car. This helps make the New Car Smell(tm) last longer.
Sometimes Mercedes use of technology really blows me away.
(Hope you got a smile. I don't really know what that hole is for.)
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
The answer
