also its a mk5 golf but no one speaks in there lol so in here is better 
kinda new to vw as had a type r last car. dont curse me 
whats all the different between rns etc i have no clue all help appretiated
I too am a newbie, but I beleive the RCD is the six disc changer with the nice colour screen and the RNS is the sat nav edition - not sure if that has a disc changer or coffee making facilities but it will get you to Asdas
What type r did you have? I had the breadvan and still miss it to this day. As basic as a climbing frame, but god what an engine..!