get a book first of all it will tell you. Disconnect the battery and pull the fuses. Let the car set for a few hours, I can't remember how many though. You have to do this because there is residual energy stored in the air bag system. Pull the cover off and unplugg the air bag.
DO NOT TAKE THIS AS THE GOSPEL I HAVE NEVER PULLED AN AIR BAG BEFORE, THIS IS WHAT I WAS TOLD BE A MECHANIC HERE IN TOWN! Personally I would take it elsewhere. Why risk the thing blowing up in your face!