Eh I doubt this module would work for my SLS
I wished there was one for the hands free kit that was optional....
I looked up the model number on that module and found that I already have that in my car (the moto kit). I guess the easiest option would be to wire it to my radio.
Unless this module would work if I had the dealer use the tech2 and tell the car that there was a hands free kit installed, then it would take my left steering controls and turn them into call / end buttons? I wouldn't mind not having the fan speed buttons just for this purpose.
Does this connector look like the same one?
Service Information.pdf