These guys are right on. It sounds like your fuel filters plugged, so you changed them. Good so far. Next you have to prime the fuel system. The primer pump works very well for this. That will get the injector pump full of fuel like it's supposed to be. If it still doesn't start after that, there are a couple of possibilities. Primer pumps sometimes go bad and start sucking air, and it's also possible you may have the IP full of fuel, but air in the injection lines. In that case, you crack (loosen slightly) the nuts holding the injector lines to the injectors and then crank the engine over. If fuel comes out at a given line, that one is good. If not, let the starter cool for a while and repeat. Sometimes this takes a while.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.