I can vouch for this procedure as well.
I have just enabled the already built-in cruise control in my trusty old 2004 Megane II CC!
Y A Y
It's SO satisfying that it works, despite my sorry-ass lack of ability in soldering
And it cost only a button for the panel, the three resistors (100ohm,271ohm,904ohm is working), a short piece of wire and the old disabled RadioStalk.
A total of 10£
Much cheaper than trying to get one of those squib/slip-rings with enough wires for the airbag steeringwheel buttons...
( Which I bought used, and now owns
Thanks to this (and other boards) for documenting how to do this !!
( And thanks to the french eletronics engineers that doesn't always suck as hard as people tend to claim