i saw thiw item on ebay

http://cgi.ebay.com/ebaymotors/ws/eB...AQ:MOTORS:1123

and i was wondering if i need anything else to install it in my x3 2.0 petrol 2005 model

like extra wiring or reprogramming something

also where i can find a good manual for the x3(wiring etc)

thanks for your attention