MERCEDES-BENZ S CLASS (2017-20) S400L 4DR SALOON LWB 2.9D DPFR SS 340 EU6 AMG LINE PREMIUM 9G-T+ AUTO

Buyer's Guide & Data from our Checks
The MERCEDES-BENZ S CLASS (2017-20) S400L 4DR SALOON LWB 2.9D DPFR SS 340 EU6 AMG LINE PREMIUM 9G-T+ AUTO is a luxury saloon that stands out in the UK market for those seeking comfort, style, and refinement. As part of the prestigious S-Class range, it is often chosen by professionals, executives, and families who value a smooth driving experience combined with high-end features. With a longer wheelbase version, the LWB model offers extra space for rear passengers, making it ideal for those who prioritize comfort during long journeys.
Based on 111 recorded checks on mycarcheck.com, this vehicle has an average mileage of around 42,000 miles, suggesting careful use. Its popularity is reflected in a high sample size of VINs, indicating solid market presence. Known for reliability and quality, the S400L is often used for executive transport or by those who desire a prestigious vehicle for everyday driving. Its luxurious features and advanced technology set it apart from competitors, making it a top choice in its class.
In comparison to rivals, the S-Class is renowned for its exceptional build quality, smooth ride, and modern design. This model’s combination of a refined diesel engine, high-end safety features, and a comfortable interior make it attractive for those looking for a premium vehicle that offers both practicality and style. Its strong reputation in the used market, with an average valuation of around £36,000, reflects its enduring appeal among discerning buyers.
Key Findings
The following statistics are drawn from our checks of 28 different vehicles, run between March 19th 2021 and February 28th 2026. These real-world insights provide context for this vehicle's place in the market, as well as its typical usage.
111
Lookups
Lookups
3
Hidden Histories
Hidden Histories
48k
Average Mileage
Average Mileage
£36,000
Average Valuation
Average Valuation












