i just installed mine into 03 x5 nav/dps/cd changer..simple 2 plug ..and play..i leave my ipod in back by nav unit as u use yr decki controls anyways..took 5 min. to install and have wrking, took about 1 hr. to grt a hold up updated and download and set up in car to do the text on the obc..and now its perfect.!! very happy..so easy.