Now emission tests are every two years now and they do connect a scan tool to the OBDII connector. Now that is for emissions so i don't know what they would do if they encountered an airbag fault.
Come to think of it i am sure the emissions folks (and probably the mechanic doing the inspection) wouldn't even see it if they hooked up a scanner since I doubt they have a VW specific scanner. (my current problem!)
I am going to disconnect the bulb! nothing to lose