2021 Mercedes-Benz S Class 2.9 S350d AMG Line

Overview

• Make: Mercedes-Benz
• Model: S Class
• Trim: AMG Line
• Version: 2.9 S350d AMG Line Auto RWD Euro 6 4dr (281 bhp)
• Year: 2021
• Mileage: 66,900 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.9 litres, 281 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 173 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 66,900 miles on the clock, this 2021 Mercedes-Benz S Class AMG Line has done roughly 24,000 more miles than a typical 2021 Mercedes-Benz S Class. The AskCar estimate for this car is £42,866. It is priced at £49,995, which is £7,129 above that estimate. The AskCar estimate draws on 570 Mercedes-Benz S Class adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 164 days ago. Its asking price has since fallen by £6,000. According to the government's MOT record, its advertised mileage is consistent with the latest test. You can find this car at SA Specialist Cars SOT in Stoke-on-Trent. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 8 November 2026.

How we estimate prices and check cars

Price

Above the going rate: £7,129 (16%) over the AskCar estimate of £42,866.

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 570 priced Mercedes-Benz S Class adverts across different ages and specifications, as of 8 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 8 November 2026.

Time on sale

This 2021 Mercedes-Benz S Class has been on sale for at least 164 days.

Price history

AskCar first saw this advert on 28 May 2026 at £55,995. Its asking price is now £49,995, £6,000 less. The latest price cut was seen on 26 September 2026.

Price changes recorded:

• 29 May 2026: £55,995
• 26 September 2026: £49,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 16 March 2027.

It has had 6 MOTs. The latest, on 17 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 66,910 miles, which matches the advertised 66,900 miles.

Advertised mileage is about 24,000 miles higher than the median mileage of a 2021 Mercedes-Benz S Class on AskCar.

Similar cars

5 other 2021 Mercedes-Benz S Class AMG Line 2.9 diesel automatic saloons are for sale at UK dealers, from £37,995 to £56,890, as of 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz S Class AMG Line, 2.9 diesel saloon, black. Mileage: 57,000 miles. Price: £39,000, £10,995 less than this car. Dealer: Car 4 Everyone in Crewe. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2021-b761f5549f0e
• 2021 Mercedes-Benz S Class AMG Line, 2.9 diesel saloon, black. Mileage: 51,128 miles. Price: £46,989, £3,006 less than this car. Dealer: Essex Prestige in Harlow. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2021-43e897bcff30
• 2021 Mercedes-Benz S Class AMG Line, 2.9 diesel saloon, black. Mileage: 44,322 miles. Price: £48,999, £996 less than this car. Dealer: Eastern Western Motor Group Mercedes-Benz of Edinburgh (Newbridge) in Edinburgh. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2021-907d90735f38