The nut is 24mm. Just take it off(remember the orientation of the steering
wheel). The wheel just then pulls off.Dont do this while driving.There is
not much in there to rasp.If it is the copper foil ,and you dont want to
spend $24, I got the foil from a Vw cabriolet that fit. the plastic it was
mounted to,didnt.Never heard of a bearing going bad.I suppose your wiper
and signal mechinism could be an issue,but dont think so.There is a black
plastic spacer,too.Usually, the coper foil tells you that it is going bad
by honking your horn when  making turning.