If you want a Jag, the only two true ones left are the XJ series and the XK series. However, even their basic platform is decades old and outdated.
If you want a Benz, the newer ones have notoriously cheaper interiors, but the older ones have a very boxy and ungainly exterior. You're best bet would probably be neither a Jag or a Benz.
I would choose either a 2000+ year BMW model 325ci or 330ci (coupe, not convertable). Just as much class or more, plus it will out-handle both of the other marques.
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