where do i go to plug back in the SRS. the mechanic said he unplugged it because on 2002 Mercedes-Benz S430

please help i need to get my car inspected

Asked by for the 2002 Mercedes-Benz S430
Because??? Have the mechanic plug the .... thing back in!!!
it was the dealership......they said it was drawing power from the battery. I need to plug it back you know where it is located