how do you replace a multifunction switch

You have to remove the steering column cover upper and lower to get to the part(recessed screws). Rather than me tellling you in words ck out youtube. There are many postings on how to do it. Also when you buy the part, do get a lifetime warranty on the part. They are know to go bad and I have changed out the third one on my 05 convertible. Cost is 55 dollars from Advanced.