Here is something I wrote a while back;
I was getting sick of my nasty wheel, so I decided to swap it with the standard Clio rubber wheel, so I could get the original retrimmed. Thanks to Ryan197 for his info.
Disconnect negative terminal of battery (I actually just disconnnected the two wires going to the negative, rather than disconnecting the bracket)
Wait 20min or so
2 x torx under the steering column, then tug down and remove, carefully, lots of wiggling necessary.
Using a large flat screw driver, poke into the bottom hole of the wheel, and lift the metal retaining bar, while pulling sharply on the airbag
Disconnect the plugs to each side, and the rear of the airbag, the side ones have a retaining clip which needs releasing before they can be disconnected. There is also an earth to the back of the airbag.
Disconnect the CC buttons (small black plug on the right) and horn (larger grey plug on the left).
Undo retaining bolt using T50 Torx
Remove wheel, guiding wires through the top hole.
Refitting is the reverse
Pics! Not necessarily in a good order;
You can make a hole in the bottom of the wheel to get to the clip, but personally I would just go in through the big hole that is already there.