Need help with Heated Steering Wheel Issue

[rjnadwodny]

I have a 06 X5 that originally came without the heated steering wheel. I had the dealer install the wheel and they are coming back to me saying that the steering wheel heated option is not working. They installed the relay and all the other OEM wiring was already inplace, so they are confused with why it wont work. They are suggesting that maybe there is a seperate controller for th esteering wheel that is nit in place. Does this make any sense?
Can anyone help me with suggestions as to why this would not work if all items are installed correctly?? Is something missing?

Thanks for your help!