Out of interest, how much Mondeo was actually in the X-Type? And which Mondeo was it based on? Given that the mk3 Mondeo and the X-Type were launched at similar time, I'd always assumed that the 2 cars were developed together, and off the same basic floorpan and platform, but when I dared to compare the X-Type to most audis on a previous thread, another user claimed that the Jag was based on the old 1993-2000 Mondeo platform.
It was based on Fords CD132 platform, which it shared with the mk3 Mondeo, the Freelander and some Lincolns models.
But I believe the CD132 was a revised CDW27 (which dated from around 1993) and that was borrowed from Mazda's GE platform before that!
A car's platform is generally it's structural design, so things like floorpan, A, B and C pillars, seat belt mounts etc.
The CD132 wasn't a great starting point for Jaguar as they were really after a small RWD layout, not a FWD one, so they heavily modified it for the all wheel drive system.
The engines were all Ford, but again Jag fiddled with the heads of the V6's, but the two oil burners were straight off Fords production line they only fiddled with the upper and lower covers to quieten them down!
The money was spent on noise, vibration and harshness, that's why all the suspension is bespoke to the Jag.
Springs, shocks and bushes were all speced by Jag, even the links in the rear independent suspension and front wishbone and ball joints were different as are the steering racks.
The styling was pretty much a failure, though the estate looked reasonable to a blind man, but saying that, they all drove really well.
I've driven to and around Italy in a diesel one and Jags work on it really showed, particularly at the end of a 14 hour drive!