Hi
A audio CD has to comply with the Red Book audio standard and has seperate tracks for each song
put it in a average PC DVD drive and you do not see the audio files
The average PC will put audio files on a data CD in a form not suitable for standard CD Players in cars or HIFI systems, although many CD players can play some types of audio files on a data CD
see wiki for more details
https/en.wikipedia.org/wiki/Optical_audio_disc
you have to find out from Volvo handbook what sort of Audio CD's can be played
Then select the correct options in ITunes
regards
Mike Barnes