Don't get it from the stealers, I got mine from GSF (German Swedish and french) for about 50 quid I think off ebay a year ago. Prices may have gone up a bit since then
There is a HOWTO, can't find it right now, but it requires removal of the end of the stalk where the groove is. Very fiddly job, cheap repair but didnt have the patience so replaced mine and now everything works fine.
followed the thread by Dec to find the N10 and mine doesn't have it - completely different relays under the fuse box frame/cover than those shown - mines a facelifted V6 maybe this makes a difference???
Anyhoo - my mechanic mate has sorted it - was just a fuse[I checked most of them that looked related and didn't see it]He checked the fuses with a multimeter and found it - was a 10a should have been 15a - strange it's lasted as long as it has[I've had her over 4years]