MERCEDES-BENZ S CLASS (2017-20) S400L 4DR SALOON LWB 2.9D DPFR SS 340 EU6 AMG LINE EXECUTIVE 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 EXECUTIVE PREMIUM 9G-T+ AUTO is a long-wheelbase luxury saloon, sitting near the top of the UK executive-car market. Its stretched cabin prioritises passenger comfort, while AMG Line styling gives this chauffeur-friendly model a more assertive look.

mycarcheck.com records 34 checks across six distinct VINs, a modest sample rather than a full reliability picture. Those vehicles averaged £31,100 in private-sale valuation, 101,000 miles and about 1.6 previous keepers; recorded annual mileage averaged 29,000. These figures offer useful market context, but individual condition and history can differ considerably.

Designed for executives and families, the S400L offers quiet long-distance comfort and generous rear space, though its size can be awkward in town. It competes with the BMW 7 Series and Audi A8, emphasising refinement and prestige. Check condition and service history, as with any used luxury car.

Considering a Mercedes S-Class? Outstanding finance, write-offs, hidden damage, mileage discrepancies or theft could turn a luxury buy into a costly mistake. Enter the reg now and check before you commit.

Key Findings

The following statistics are drawn from our checks of 6 different vehicles, run between May 13th 2021 and October 31st 2026. These real-world insights provide context for this vehicle's place in the market, as well as its typical usage.

34
Lookups

1
Hidden Histories

113k
Average Mileage

£31,100
Average Valuation