there are two star drive screws fitted to the rear of the steering wheel which hold the airbag,angled slightly outboard turn steering so you can remove them from the bottom then once loose remove the plugs for wires to airbag and horn + trip computer by squeezing slightly the steering wheel has one large bolt in center it should be marked with paint so refitting keeps wheel aligned i just did this on my 2005 mondeo as airbag went off after collision!quite a simple procedure
gary, June 2010