Tell us about yourself!
So I was thinking about how you could do it without disassembling the steering wheel, because mine has an airbag as well. The only difference I would do, is that instead of disassembling the steering wheel, I would remove the covering of the steering column, and run the wire down under the dash, or to wherever you are putting your button. Replace the plastic cover and your wire is covered. What would be totally awesome is if I could get a button and replace one of the button placeholders in my dash.