This next piece covers the removal of the steering wheel. IMPORTANT, if you are going to follow these instructions, you must disconnect the battery (both terminals) and leave the car for a good 20 minutes before beginning. As part of this procedure you will need to remove the airbag module and this contains explosives, any residual current in the SRS wiring may trigger the airbag if disturbed. OK, warning over, Scarlet's battery has been disconnected since February so I don't think I need to worry too much about this! Begin by finding the two screws that retain the airbag, there is one each side of the steering wheel, in the slots in the back and they require a T30 Torx bit to remove.
Undo and remove the two bolts using a T30 Torx bit, thus. Having done this a few times now, you wouldn't believe how much easier it is with the dashboard removed!
Gently withdraw the airbag module from the centre of the wheel and unplug the yellow wire. IMPORTANT, the airbag is now free of the car, there is however a small risk that it can go off. Treat it gently and follow the following safety steps. Never place it pad side down - if it goes off it will fly across the room. Never put anything on top of the pad - for the same reason. Store away from flammable items, preferably on it's own and protect from frost / heat - Scarlet's one is on a top shelf, away from everything else.
With the airbag stored safely, the next step is to disconnect the horn multiplug (and the gear change ones if you have a Steptronic / Stepspeed).
Using a 19mm socket on an extension, undo the central retaining nut (you will need to grip the steering wheel too).
Gently withdraw the steering wheel from the spline. Do not turn the spline as you will end up with a wonky wheel when you re-fit it and also, do not play around with the rotary coupler as it is easy to break.
Under the rotary coupler is the indicator cancelling cam, when you come to refit the steering wheel, ensure that the lugs are correctly aligned with the indents in the steering wheel.