2021 Mercedes-Benz S Class 2.9 S400Ld AMG Line Premium Plus Executive

Price: £54,990. Fair price: £3,083 (5%) under the AskCar estimate of £58,073, our expected asking price for this car from its model, age, mileage and specification, drawing on 571 priced Mercedes-Benz S Class adverts on AskCar as of 12 November 2026.

AskCar lists 634 used Mercedes-Benz S Class from 440 UK dealerships, as of 12 November 2026.

Overview

  • Make: Mercedes-Benz
  • Model: S Class
  • Trim: AMG Line Premium Plus Executive
  • Version: 2.9 S400Ld AMG Line AMG Line Premium Plus Executive G-Tronic+ 4WD Euro 6 (s/s) 4dr (Premium Plus, Executive) (325 bhp)
  • Year: 2021
  • Mileage: 44,870 miles
  • Fuel: Diesel
  • Body: Saloon, 4 doors, 5 seats
  • Engine: 2.9 litres, 325 bhp
  • Gearbox: Automatic (G-Tronic+)
  • Drive: Four-wheel drive
  • Colour: Black
  • CO2: 191 g/km
  • Emissions standard: Euro 6, ULEZ compliant

About this car

The advertised mileage for this 2021 Mercedes-Benz S Class AMG Line Premium Plus Executive is 44,870 miles. Its asking price of £54,990 is £3,083 below the AskCar estimate of £58,073. The AskCar estimate uses 571 UK dealer adverts for the Mercedes-Benz S Class, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 102 days ago, the asking price has dropped by £3,000. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Brackley Autos, based in Bedford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 12 November 2026.

How we estimate prices and check cars

Price

Fair price: £3,083 (5%) under the AskCar estimate of £58,073.

The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.

It draws on 571 priced Mercedes-Benz S Class adverts across different ages and specifications, as of 12 November 2026.

A 2021 Mercedes-Benz S Class with the 2.9 diesel engine is typically advertised at £53,000: the median of the 24 for sale on AskCar, as of 12 November 2026.

Time on sale

This 2021 Mercedes-Benz S Class has been on sale for at least 102 days.

Price history

AskCar first saw this advert on 2 August 2026 at £57,990. Its asking price is now £54,990, £3,000 less. The latest price cut was seen on 30 October 2026.

Price changes recorded:

  • 2 August 2026: £57,990
  • 18 September 2026: £56,990
  • 30 October 2026: £54,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 12 November 2026: valid until 26 January 2027.

It has had one MOT, on 27 January 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 42,408 miles, which matches the advertised 44,870 miles.

Advertised mileage is about 1,300 miles higher than the median mileage of a 2021 Mercedes-Benz S Class on AskCar.

Similar cars

2 other 2021 Mercedes-Benz S Class AMG Line Premium Plus Executive 2.9 diesel automatic saloons are for sale at UK dealers, from £54,990 to £61,990, as of 12 November 2026.

The 2 closest to this car in mileage:

Browse all Mercedes-Benz S Class cars for sale · 2021 Mercedes-Benz S Class price guide

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Photos

58 photos of this car are on its AskCar page.

As of 12 November 2026, AskCar lists 596,362 cars and vans from 12,840 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.