My Dad buys the test drive models so these were only ever used at the dealership. See photos.
I have no idea of what year or exact model they came out of other than that that it was an E Class Wagon some time over the last ten years. Please don't message asking me if they are going to fit your car because I have no clue!! If they appear to be the right shape based on the photos they'll likely fit/work and that's why I'm listing a basically never used complete set of four OEM Mercedes floor mates for $50.
The numbers on the back of the mats - all 4 have the same number on the clip in piece : A 000 998 2077 SGF PA66 - but given it's the same on all 4 mats that could just the part number for the clip lol...
My eye can't determine if they are some kind of grey tone, a soft black or deep brown. See photos.
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Separately, my father was in the residential real estate business for 50 years - he recently retired so we are selling off all his New Old Stock 'inventory' of materials.
We have (or at one point did have) a bunch of other building materials and tools listings up - click the button under the map that says 'more ads by this user' to see what's left.