The Mercedes-Benz S Class (2017-20), particularly the S350 4DR Saloon 2.9D, is a flagship luxury vehicle renowned for its comfort, advanced features, and refined driving experience. As a large executive saloon, it caters mainly to professionals, businesspeople, and those seeking a premium ride, standing out in the UK market for its blend of sophistication and technology. The model is frequently seen used for executive transport, thanks to its spacious interior and smooth ride, making it ideal for longer journeys, commuting, or chauffeur services. Data from mycarcheck.com shows that the S350 has a relatively high survey interest, with 61 lookups from 24 different VINs, indicating its popularity and trustworthiness among prospective buyers. Its average valuation for private sales stands at around £33,600, with typical mileage of 61,000 miles, and most owners keep the vehicle for nearly two years. This suggests it's often bought by those who appreciate reliability and comfort, usually with just under two previous owners. What makes this model and its variants notable is its luxurious AMG Line and Premium Plus packages, offering a high level of comfort, advanced safety features, and a refined design. Compared to rivals like the BMW 7 Series or Audi A8, the S Class is often praised for its superior build quality, smoothness, and executive feel. Overall, the Mercedes-Benz S350 from this period offers an exceptional mix of style, practicality, and prestige, making it a sought-after choice among premium saloons in the UK market.