what is this sticker for? anyone please? from GLA250 2016

i found this sticker today from 2016 GLA250 back of the rear view mirror. am i trace by someone or trace by the alien?? weird..i did not noticed for several years it was there?!?? what is it??

i found this sticker today from 2016 GLA250 back of the rear view mirror.
am i trace by someone or trace by the alien?? weird..i did not noticed for several years it was there?!?? what is it??

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