Hi all, I have an '06 A4 with Naviplus and Bose but no CD changer. I am not much of a techno head, but I presume that I can get MMC or SD cards to slot in to the two slots behind the screen, but it seems pretty specific in the manual which ones I can and cannot use. Any idea where I can get some and exactly what I will need to get as it is all double-dutch to me ? Also, will this mean that I can continue to listen to music on these whilst the Sat Nav is still working ? Finally, what size will I need ( I presume there is a maximum the unit will read ) and how many songs would I be able to load on one of these ? Sorry for all the questions, but any help would be gratefully received .