Most Mercedes-Benz airbag modules are VIN specific. A new virgin airbag module is programmed the vehicle and then that module cannot be used again, because it already has a VIN and it locks the module.
Yes, we can clear out the VIN in a used srs airbag control module unit. So, it can be used in another vehicle. You will need to have a Mercedes scan tool or a scan tool that has ability to program a new Mercedes airbag control module. This is a custom request and you will need to put a note on the module using a masking tape and write "CLEAR VIN" on both front and back of the module.