2021 Mercedes-Benz S Class 2.9 S400Ld AMG Line Premium Plus Executive
Price: £54,990. Fair price: £4,622 (7%) under the AskCar estimate of £59,612, our expected asking price for this car from its model, age, mileage and specification, drawing on 568 priced Mercedes-Benz S Class adverts on AskCar as of 7 November 2026.
AskCar lists 637 used Mercedes-Benz S Class from 447 UK dealerships, as of 7 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: 42,573 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
This 2021 Mercedes-Benz S Class AMG Line Premium Plus Executive has covered 42,573 miles. Priced at £54,990, it is advertised £4,622 below the AskCar estimate of £59,612. To work out the AskCar estimate, we analyse UK dealer adverts for 568 Mercedes-Benz S Class cars across different ages and specifications. It first appeared in our advert records 112 days ago. We checked its advertised mileage against the government's MOT record, and they match. It is advertised by Park Road Garage in Bedford. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 7 November 2026.
Price
Fair price: £4,622 (7%) under the AskCar estimate of £59,612.
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 568 priced Mercedes-Benz S Class adverts across different ages and specifications, as of 7 November 2026.
A 2021 Mercedes-Benz S Class with the 2.9 diesel engine is typically advertised at £53,900: the median of the 22 for sale on AskCar, as of 7 November 2026.
Time on sale
This 2021 Mercedes-Benz S Class has been on sale for at least 112 days.
Price history
AskCar first saw this advert on 18 July 2026 at £54,990. Its asking price has not changed.
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 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 42,573 miles.
Similar cars
1 other 2021 Mercedes-Benz S Class AMG Line Premium Plus Executive 2.9 diesel automatic saloon is for sale at UK dealers, as of 7 November 2026.
The closest to this car in mileage:
- 2021 Mercedes-Benz S Class AMG Line Premium Plus Executive, 2.9 diesel saloon, black. Mileage: 32,000 miles. Price: £61,990, £7,000 more than this car. Dealer: Chobham Motor Company in Chobham. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2021-6490b6d12a1b
Browse all Mercedes-Benz S Class cars for sale · 2021 Mercedes-Benz S Class price guide
More like this
- Used Mercedes-Benz S Class AMG Line Premium Plus Executive prices
- Used diesel Mercedes-Benz S Class for sale
- Used Mercedes-Benz S Class for sale near Bedford
Photos
45 photos of this car are on its AskCar page.
As of 7 November 2026, AskCar lists 601,018 cars and vans from 12,892 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.