Found this on the main seat website! I dont think this is correct!!!!!
http://www.seat.co.uk/generator/su/uk/SEAT/site/Service/original-accessories/main.html
http://www.seat.co.uk/generator/su/uk/SEAT/site/Service/original-accessories/main.html
I use a wireless thing. You plug it into your mp3 player, then just select the matching radio channel from the transmitter to your radio. Simple, think it cost about £25, its made by belkin. Very good sound quality, no static and no cables, sorted!
They are illegal though unless you have a licence for transmitting FM radio waves
get an ipod xcarlink, i got one for christmas, its really good, and allows you to use all the functions of the standard head unit. i.e skip track and pause etc... there about 60-70 quid IIRC and it just loops through your cd changer cable