Not exactly answering your question, but I'll write for the benefit of
others:

I got an airbag lamp after striking my steering wheel with my fist (got
mad at being cut off by another driver).

I took it to an independent, who disconnected the wire between the
airbag and the steering column, reconnected it, and reset the error code
via the Bosch equivalent of the VAG-com. Apparently my hitting the wheel
caused a momentary loss of contact in the connector, triggering the fault.

Moral of the story - if you get an airbag light, keep in mind that the
fix may be trivial.

/Robert