I have a VW Touran with a head unit that is manufactured by Blaupunkt ( RCD 300 ) with I believe a ' quadlock' connection at the rear of the unit , for connecting a cd changer. I want to play the audio form my iPAQ via it's 3.5mm headphone jack through the head unit. Despite looking at loads of products ( especially for ipods !) I cannot find a cable that is suitable other than fm modulators etc. Can anyone help / advise please ?