Francisco, just to let you know that I eventually managed to pop the spring clips on the back of the steering wheel which hold the airbag in position. Once the airbag is removed it is a simple matter of tightening the torx screw (T50) which holds the steering wheel.
Sorry for the delay in replying.
I have some other questions for the forum which I will post later.
Thanks.
C5 Steering wheel revisited
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