To take the steering wheel off you have to deal with the air bag. This could be a problem if you are not careful. First thing you need to do is disconnect the battery, second thing to do is make sure the battery is disconnected and that the battery wires will not accidently make contact with the battery.

One one of my other German cars I wait 30 mins after disconnecting the battery before I mess with the air bag. Is that necessary, I really don't know but but one of my friends said you are supposed to wait that period of time so out of an abundance of caution I wait.

There are a couple of torx screws that hold the air bag to the wheel and then wires connecting the airbag to the wheel.

Do not rely soley on the information I've provide to take your steering wheel off. While it's not that hard and it doesn't take long to do if you screw something up it can be a mess and you can possible hurt yourself.

I would not think a dealer would charge more than an hour to do this so you might want to think about that.