What part is this (MB82356)

[pot]

Good evening gents. Hope someone here could give a me hand here and identify what this part is. It is part no MB82356:



Appreciate any help anyone can provide. Thank you.

 

[467]

The label is folded. Seatbelt buzzer 1G DSM MB802356. click

 

[pot]

Thank you! This is a huge help.