Kostas
Before I retrofitted my Professional Sat Nav which I believe you have
done as well,I got the BMW dealer to install the BMW IPOD interface with
the cable /connector running into the glovebox.He did ask me if I have
Sat Nav or CD changer and I said no at the time.It takes them about an
hour to fit.

Because I retrofitted the Professional Sat Nav I I thought the ipod
cable may be different,I left the original wiring as it was and tried it
and it turns out it works fine ,exactly as before.
..and displays the track number on the monitor.Just rang my dealer BMW
have said to me today that there is just one part no. /one type of kit
they do for the X3
Part no. is 65410409610 in the UK

Thanks
David