For people who have got it to work when you turn the ignition on does the cruise control light come on? If it does, an easy way to test to see if your car supports it could be to try enabling it using ELMconfig and if it illuminates your car supports it.
If someone butchered a 4 spoke steering wheel and had the buttons left over, would I be able to plug them in to my car without changing the wheel at all? I understand they will not fit to the wheel properly, but I would be able to find someone to make up a mounting bracket so they can just clip to the steering column.
Don't want to risk buying them and find they HAVE to plug into a socket which is only on the 4 spoke wheel. I would normally just dive in and try it, but would rather ask you experts first.
The connectors are the same just with a couple of extra wires. I would have taken a pic but I've just put the airbag back on. If you want you could connect the controls into the wires under the steering column