metal plate found with vin

[cbenz1]

I found this metal piece under the driver seat when I took them out.  It looks like it broke off something bigger.  I think Phil said it might be out of the maintenance book?  Can anyone verify what this is? Is it common to have this?

[114015]

Windshield plate.

Located on the inside of the left A-pillar padding on US cars only (from a certain VIN onwards), visible (for the cops) through the windshield.

Try to upload a pic later tonight.


Achim
(only 5 Euro cars and therefore without such a plate)