Identify this Relay looking thing!

[talonkev]

I'm Cleaning up the wiring of my 1g. There is a relay looking box on the driver side rear seat area, near the seat belt control box / rear wiper relay. It has part number MB530319 on it. I have searched and can't find any info on it. Does anyone know what it controls? I attached a pic showing its location. Thanks!

 

[LKWTSI]

It's part of the automatic seatbelt motor relays.

I can't find anything specific in any of the DSM manuals. I just did the seatbelt elimination and it was part of the wiring harness for the seatbelts and the I have a spare one if you need it.