The steering wheel controls working with the IPod I know that since I read it somewhere, but you can go through your favourites or something like that [not having an IPod]....
try this
http://www.incarelectrics.co.uk/uploads/HTML/Seat_Altea_iceLink_Plus_ipod_accessory_675_1.htm
http://www.ghc.co.uk/icelink/
http://www.essentialipod.co.uk/product.php?xProd=55&xSec=17
this bit from above
"ice>Link Plus playlist mode maps the first five playlists stored on the iPod to CDs 1-5 on your head unit keys. Although the iPod keypad is disabled in this mode, the iPod display (and CD Text/dashboard displays in some applications) will show ID3 data of the currently playing song. Advanced content features including Random, Repeat, Scan and AlbumPlay are also available. CD6 accesses the ice>Link Plus menu that lets you browse all of the playlists on your iPod using your head unit FF/RW keys. The menu also provides configuration options for advanced features of the interface. Please note that the original 1G/2G iPods that don't have the bottom-mounted dock connector do not support ice>Link Plus playlist mode or the menu.
"
Now you won't get any titles up on the headend since the software in the headend doesn't support showing titles from the "CD Changer" - there is no menu option, this is what hibitdat pointed out to me once when I was asking re a MD Changer, believe it was he.
I looked at all these pages when I was in hot pursuit of the interface box which connects the Altea headend with Sony changers whether CD / MD etc. Thread elsewhere... that all works perfectly so far, so good, the MD Changer is working nicely and supports randon play of disc and tracks. I seem to recall that the built in Altea doesn't, perhaps it does, but you press the Disc Random Track button and it shuffles tracks between disks if that take your fancy with the MD being pulled in just before the track end for the next to play etc... all clever stuff
.
It's a good headend in the Altea, wish people would stop knocking it, the speakers are crap they just need changing. If people want to drive around with a big arrow that says "please break into my car I got a DIN fitting radio worth nicking" then that's the way to go
. In London you wouldn't want to do that, I had my back window taken out and parcel shelf stolen for my parcel shelf speakers in the past, after that I developed a strategy of now not showing anything different in the car than nothing.