Currently we have the symphony 2 cd player installed with the 6 cd changer at the top so it's double din The RNS-E will be a straight swap, i assume you can put over 6 cd;s worth of information onto the two memory cards? Does the dvd need to be in all the time to use the sat nav? I need to buy the RNS-E for an 8p audi a3? the relevant lead, we don't have bose so is there only one other lead? How much more expensive is it to install blue tooth as i haven't found that much info on the bluetooth side of things? we don't have a multi function steering wheel, so are there normaly buttons you can use? Will any of the units of ebay work or is it better to buy from someone in particular i.e topsatnavs? Will we also need to dvd for 2007? sorry for so many questions just looking for more info before i commit to buying one? I assume you wouldn't need an ipod link once you can have two sd cards worth of mp3's?