2020 Mercedes-Benz S Class prices

There are 19 used 2020 Mercedes-Benz S Class cars for sale from UK dealers on AskCar, as of 10 November 2026. Typical asking price £30,000 (the median: half cost less, half cost more). The cheapest is £18,990. The middle half are priced between £27,000 and £36,000. Median mileage: about 79,000 miles.

Dealers lowered the asking price on more than a quarter of 2020 Mercedes-Benz S Class cars: 5 of the 19 in the 14 days to 10 November 2026.

2020 Mercedes-Benz S Class against other years

A 2019 Mercedes-Benz S Class car has a typical asking price of £26,500 and a 2021 one £55,000, as of 10 November 2026.

AskCar lists 637 used Mercedes-Benz S Class across the UK, from 445 dealerships.

As of 10 November 2026, AskCar lists 591,054 cars and vans from 12,888 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

2020 Mercedes-Benz S Class cars for sale now, page 1 of 2

This page picks out up to 10 cars in each of these groups: best value, cheapest, lowest mileage and recently reduced. A car in more than one group is listed in full once. The groups pick only from cars with photos and an AskCar estimate, priced at £500 or more and no more than 25% under that estimate. 16 of the 17 cars listed here meet these rules. Page 2 lists every other 2020 Mercedes-Benz S Class car, cheapest first, including the one the groups do not pick from.

The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 573 priced Mercedes-Benz S Class adverts on AskCar as of 10 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2020 Mercedes-Benz S Class.

Each car: year, make, model, engine and trim, power, gearbox, fuel, body, doors, colour; mileage; price and its changes; how the price compares with the AskCar estimate; emissions standard and ULEZ compliance where it holds; MOT; dealer and town; AskCar page. Each car's AskCar page has its full price history and cheaper cars like it.

This list leaves out 2 cars whose advertised mileage is lower than the mileage recorded at their last MOT test.

Best value 2020 Mercedes-Benz S Class: priced furthest below the AskCar estimate

Their asking prices run from £18,990 to £30,995.

Cheapest 2020 Mercedes-Benz S Class: the lowest asking prices

These 10 are priced £18,990 to £29,988. They have covered 62,550 to 151,196 miles.

Lowest-mileage 2020 Mercedes-Benz S Class

These 10 have covered 249 to 81,000 miles. Their asking prices run from £27,990 to £229,000.

Recently reduced 2020 Mercedes-Benz S Class: the biggest price reductions in the 14 days to 10 November 2026

The dealer lowered the asking price on each of these 3 in the 14 days to 10 November 2026. Their reductions since AskCar first saw them run from £1,000 to £2,000.

Mercedes-Benz S Class by gearbox, fuel and body

Mercedes-Benz S Class prices by year

Mercedes-Benz S Class by trim

Mercedes-Benz S Class by price

Mercedes-Benz S Class near you

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