The MERCEDES-BENZ S CLASS (2017-20) S450L 4DR SALOON LWB 3.0 GPF SS 389 EU6 GRAND EDITION EXECUTIVE 9G-T+ AUTO is a long-wheelbase, four-door luxury saloon at the top end of the UK executive-car market. Its extended cabin prioritises rear-seat space and comfort, while the petrol engine and automatic transmission promise relaxed, refined travel. mycarcheck.com recorded 39 look-ups across 17 distinct VINs, a useful snapshot but not a broad reliability verdict. Average private-sale valuation was £37,400; recorded mileage averaged 63,000, with annual mileage of 21,000. The checks showed 0.72 previous keepers on average, indicating few ownership changes among the vehicles sampled. Best suited to executives, business users and buyers wanting generous passenger comfort, it also works for long-distance journeys, though its size and running costs may not suit tight-town driving or budget motoring. Grand Edition Executive trim gives the S-Class a luxurious, technology-rich feel. Against rivals such as the BMW 7 Series and Audi A8, it is especially known for a calm, cosseting ride and an imposing presence.