2021 Mercedes-Benz S Class 2.9 S350d Grand Edition Executive
Price: £40,000. Fair price: £1,373 (3%) under the AskCar estimate of £41,373, 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: Grand Edition Executive
- Version: 2.9 S350d Grand Edition Executive G-Tronic+ RWD Euro 6 (s/s) 4dr (282 bhp)
- Year: 2021
- Mileage: 41,790 miles
- Fuel: Diesel
- Body: Saloon, 4 doors, 5 seats
- Engine: 2.9 litres, 282 bhp
- Gearbox: Automatic (G-Tronic+)
- Drive: Rear-wheel drive
- Colour: Black
- CO2: 183 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2021 Mercedes-Benz S Class Grand Edition Executive has covered 41,790 miles. The dealer is asking £40,000, which is £1,373 below the AskCar estimate of £41,373. To work out the AskCar estimate, we analyse UK dealer adverts for 568 Mercedes-Benz S Class cars across different ages and specifications. We first recorded this car for sale today. Its advertised mileage matches the government's MOT record. The seller is Sytner Group Mercedes-Benz of Swindon, based in Swindon. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 7 November 2026.
Price
Fair price: £1,373 (3%) under the AskCar estimate of £41,373.
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
AskCar first saw this 2021 Mercedes-Benz S Class advertised today.
Price history
AskCar first saw this advert on 7 November 2026 at £40,000. 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 1 March 2027.
It failed its MOT on 13 February 2026 (nearside front suspension arm ball joint excessively worn spring link arm) and passed 3 days later, on 16 February 2026.
Advisories at the latest test: offside front suspension arm ball joint has slight play spring link arm.
Mileage at that test: 36,185 miles, which matches the advertised 41,790 miles.
Advertised mileage is about 800 miles lower than the median mileage of a 2021 Mercedes-Benz S Class on AskCar.
Browse all Mercedes-Benz S Class cars for sale · 2021 Mercedes-Benz S Class price guide
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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.