Thanks for the replies.
The screws holding the airbag in place are T30 torx. A screwdriver style tool works well to reach the screws, when the column is extended all the way. You can also use a tool (p/n 126 589 00 10 00) that Mercedes sells for about four dollars.
The main steering wheel screw is a 10mm hex. This is where the fun starts for me. I cannot get it off. I tried a two foot breaker bar. I brought it to the dealer and they tried with air guns and a breaker bar. I'm afraid that something will snap and I'll have to mortgage the house to fix it.
Has anyone come across this before? I'm thinking heat may soften the loctite.
I'll probably redye it in place, but it still bothers me that it's stuck, for future repairs...