to remove the airbag if you havent done one before it is safer to get a garage to do it.
1 if it goes off they are liable for the damage.
however. basically disconnect the car battery and leave for 24hours, to be safe
then the airbag is held onto the steering weel at the rear by two allen bolts, remove these and disconnect the airbag and then remove the steering wheel marking it so it goes back on straight.
refiiting is reversal however sometimes the airbag light will stay on so will need vag to reset it.
but as stated if you havent done it before would recomend getting a garage to do it for your own saftey at the time and in the future.