I believe I've read every thread in this and other websites relating to upgrading the early XK8 head unit to a more modern unit with ipod/iphone and satellite capabilities.
I found the "smoggyx100"(6/28/11) thread particularly helpful and I've taken advantage of his excellent approach to installing a new Alpine head unit.
I have an excellent installer who's going do the actual "hands on" work. I've provided him with copies of all the relevant threads I've found.
Where we're left dangling is that every cited upgrade is aimed at the base rather then premium systems. The best additional info states that you probably need to splice in new "30 pin connector" to utilize the existing amp, etc. Can anyone provide more substantive and/or detailed ideas in how to upgrade the head unit in a 98 XK8 with the Premium System? Thanks