Right, ill try to not make this too long winded! this afternoon i decided to update my playlists on the sd card in the b6 s4. I updated it via i tune my walkman through i tunes, which is the only way i know how to do it leaving my playlists just as they are on my i pod. I have 3 play lists selected, all are showing to have gone on to sd card when i view it on my mac book but as soon as i put it into the car it only lists 2 of the play lists. I have tried to combine the playlist that wont show up in the car with one that does but none of the tracks on the mysterious playlist are there in the car .. weird. i have checked all the files are in mp3 format not aac, there are only around 200 songs in total and after 3 hours im running out of ideas and any help or advice would be greatly appreciated!