What is this in glovebox of 2014 S600?

Thanks

Its the fragrance air balance canister.

And each fragrance canister is about $100. If I remember right, the variety pack is ~$600.

And since you're a fellow W222 S600 owner: Coil Pack - 2799061100 - $173

You can get an empty canister and fill it with anything you want also. That’s what I’ve done.

That there is the one and only reason to buy the car (I have a thing for air fresheners)

You can re-fill it with anything you like, cologne, perfume, scented oils. The Mercedes scents are quite nice, but $100 or over.

I have refilled mine with a very fresh, non-invasive cologne, and it works great, but will say that since it is alcohol based, it only seems to last about a month. I understand that the OEM Mercedes scents or oils last 6-12 months. I keep mine on "high" or "max" (most scent distribution).