The MERCEDES-BENZ S CLASS (2017-20) S400L 4DR SALOON LWB 2.9D DPFR SS 340 EU6 GRAND EDITION EXECUTIVE 9G-T+ AUTO is a long-wheelbase luxury saloon, sitting at the top end of the UK market rather than among everyday family cars. Its extended rear cabin prioritises passenger comfort, while diesel power and automatic transmission suit relaxed, quiet journeys. In mycarcheck.com checks, this model recorded 17 look-ups across six distinct VINs, a modest sample overall. The checked cars averaged £43,300 in private-sale valuation, 36,000 miles and 7,000 miles annually. The recorded average was 0.47 previous keepers, suggesting many checked cars had no recorded keeper change, though these figures describe checked vehicles, not every S-Class. Grand Edition Executive trim feels polished. Generous rear space suits chauffeur use and long journeys. This S-Class is less suited to tight city parking or low-cost motoring, but its refinement, prestige and comfort distinguish it from less luxurious rivals. It is a compelling alternative to the BMW 7 Series and Audi A8 for buyers seeking a spacious, comfortable executive car.