Hi All,
I'm very happy to thanks you all for this mission done.
With J.PUMA's "How To" and 3 friends, we have done the retrofitting in a complete days.
No really big issues met but with 4 persons working on it, you can easily find a better solution in order to do it in a perfect condition.
Now, I have a known problem ==> Airbag light stay always "on" ... I will certainly find a solution in this forum again.
Thanks again to X5world and all active members !