IF you are after a diesel-powered luxury sedan in the low $100,000 region, you are in for a big treat, with both Mercedes-Benz and BMW pushing through all-new models that tick most peoples’ boxes with unequivocal ease. But the latest Jaguar XF S 3.0D is something else entirely, delivering high-output performance that will knock your socks off, combined with impressively low fuel consumption and emissions figures. Add exceptional design inside and out, and the latest Jaguar is out to be the best diesel car in its class.