Changed the sensor mat and eliminated the airbag warning light and would be happy to post the process I went thru with pictures if anyone is interested. I do need help in figuring out how to post pictures (I may not have enough posts to include a picture??).

Anyway, took about 4 hrs and $110 in parts (sensor mat + clips from dealer) with the most difficult part being the removal and replacement of wire clips that secure the leather to the seat. Pretty easy $250-400 labor savings if/when this thing fails. You will need to have the SRS code read and the warning light reset which does require a special tool that is available from Peake Research for $119. My indepenadant would do the read but would not reset claiming legal liability issues since they didn't do the repair - makes sense I guess. I had purchased the tool since I needed it for the same repair on my M3. I plan to keep it, but could sell it pretty easily on ebay and get most of the cost recovered.

Anyway, little help with how to post pictures and I'll post the DIY.