Yes, I looked at the instruction manual and picture. If you do, you will notice it goes directly into the Z110, not an HD tuner. My HD tuner stopped working when I installed the MSN Direct device so my question was whether or not this was related. Since this unit doesn't work with even the newest model CD changer it wouldn't have surprised me if this wasn't compatible as well.
Anyway, after some further trouble-shooting I determined that the antenna extension was faulty and I stressed a weak point, thus causing it to fail. Replaced extension and all is good.