The MERCEDES-BENZ S CLASS (2017-20) S350L 4DR SALOON 2.9D DPFR SS 286 EU6 AMG LINE PREMIUM 9G-T+ AUTO is a long-wheelbase luxury saloon, sitting at the top end of the UK executive-car market. It prioritises quiet comfort, space and an impressive presence over compact size, making it a premium alternative to the BMW 7 Series and Audi A8 for buyers seeking extra rear-seat room and refinement. Mycarcheck.com records 409 checks covering 149 distinct VINs, a useful sample of interest in this high-end model. The average private-sale valuation is £32,800, while checked cars average 56,000 miles and 12,000 miles a year. They have around 1.6 previous keepers on average, offering helpful context when assessing an individual car. Best suited to executives, chauffeur use or families wanting rear-seat space, the S350L works well for long-distance travel. Its diesel engine and automatic gearbox deliver relaxed progress, while AMG Line Premium trim adds styling and comfort. Compared with mainstream saloons, it feels prestigious and spacious, though ownership costs are higher.