The MERCEDES-BENZ S CLASS (2017-20) S450L 4DR SALOON LWB 3.0 SS 389 EU6 AMG LINE EXECUTIVE PREMIUM 9G-T+ AUTO is a long-wheelbase luxury saloon focused on rear-seat comfort and refinement. It sits at the top of the UK market, competing with the BMW 7 Series and Audi A8. mycarcheck.com recorded 40 look-ups covering 13 different VINs, offering a useful, though not huge, snapshot. The average private-sale valuation was £30,400, while average recorded mileage was 82,000 miles and annual mileage 21,000. Checks showed around 1.7 previous keepers on average, suggesting many examples have had relatively few owners. Best suited to executives, chauffeured travel and buyers who carry passengers, it also works for long-distance journeys. The 3.0-litre petrol engine and smooth automatic gearbox deliver quiet progress, while AMG Line styling adds a sportier edge. Expect premium running costs; choose this Mercedes S-Class for space, craftsmanship and calm rather than economy or city parking.