Can you think of any resource that would help me determine which Jaguar models and years are fitted with seats where the head rests are adjustable, able to slide up-and-down on posts, vs. headrests which are fixed, integrated into the seat back? Think of:

vs

As far as I can determine:

- The XK8, up to 2000, used the fixed head rests. Then, in 2001, they switched to the adjustable headrests. However, maybe in the year 2008 they switched back?

- The XKR 100 used fixed head rests back in the 2001 and 2002 models, but the latest models are adjustable headrests

- The XJS used fixed head rests back in the 80's, up to about 1995, and then switched to adjustable head rests.

- The X150 always used adjustable headrests.


This has been a bear to figure out? Any clarity possible? Thanks