2020 Mercedes-Benz S Class 2.9
Price: £31,995. Above the going rate: £6,311 (24%) over the AskCar estimate of £25,684, our expected asking price for this car from its model, age, mileage and specification, drawing on 573 priced Mercedes-Benz S Class adverts on AskCar as of 10 November 2026.
AskCar lists 637 used Mercedes-Benz S Class from 445 UK dealerships, as of 10 November 2026.
Overview
- Make: Mercedes-Benz
- Model: S Class
- Version: 2.9 Auto RWD Euro 6 4dr (282 bhp)
- Year: 2020
- Mileage: 99,500 miles
- Fuel: Diesel
- Body: Saloon, 4 doors, 5 seats
- Engine: 2.9 litres, 282 bhp
- Gearbox: Automatic
- Drive: Rear-wheel drive
- Colour: Black
- CO2: 185 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2020 Mercedes-Benz S Class has covered 99,500 miles, around 20,800 more miles than is typical for its age. Its asking price of £31,995 is £6,311 above the AskCar estimate of £25,684. The AskCar estimate uses UK dealer asking prices, including 573 Mercedes-Benz S Class adverts, and accounts for the car’s age, mileage and specification. It first appeared in our advert records 19 days ago. The government's MOT record matches its advertised mileage. It is advertised by WiseCars in Uxbridge. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 10 November 2026.
WiseCars is rated 4.4 out of 5 on Google.
Price
Above the going rate: £6,311 (24%) over the AskCar estimate of £25,684.
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 573 priced Mercedes-Benz S Class adverts across different ages and specifications, as of 10 November 2026.
A 2020 Mercedes-Benz S Class with the 2.9 diesel engine is typically advertised at £28,000: the median of the 12 for sale on AskCar, as of 10 November 2026.
Time on sale
This 2020 Mercedes-Benz S Class has been on sale for at least 19 days.
Price history
AskCar first saw this advert on 22 October 2026 at £31,990. Its asking price is now £31,995, £5 more.
Price changes recorded:
- 22 October 2026: £31,990
- 9 November 2026: £31,995
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 10 November 2026: valid until 21 May 2027.
It has had 8 MOTs. The latest, on 22 May 2026, passed.
Advisories at the latest test: oil leak, but not excessive.
Mileage at that test: 99,179 miles, which matches the advertised 99,500 miles.
Advertised mileage is about 20,800 miles higher than the median mileage of a 2020 Mercedes-Benz S Class on AskCar.
Browse all Mercedes-Benz S Class cars for sale · 2020 Mercedes-Benz S Class price guide
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Photos
3 photos of this car are on its AskCar page.
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.