there is a separate part number for the wiring part of the set up. I have to say i didn't bother.

I have had a problem with the battery in my X5 for two years. Can’t use any heavy duty component (heated seats, rear view demister, even Bluetooth) without running the battery down. BMW have told me that I do not drive the car enough, or that you could describe my usage as “Unfavourable”. Ther ...

Sorry about the quality of the picture, but you get the idea.

http://lh3.ggpht.com/_2edpR1FzWRk/TTl6y ... C03491.JPG

BTW it cost £258 from Bavarian Belfast, slightly more than half of the Dublin main dealer price.