2021 Mercedes-Benz S Class 2.9 S350d AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: S Class
• Trim: AMG Line Premium
• Version: 2.9 S350d L AMG Line Premium 9G-Tronic RWD Euro 6 4dr (281 bhp)
• Year: 2021
• Mileage: 35,211 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.9 litres, 281 bhp
• Gearbox: Automatic (9G-Tronic)
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 180 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 35,211 miles, this 2021 Mercedes-Benz S Class AMG Line Premium has covered about 7,400 fewer miles than other 2021 Mercedes-Benz S Class cars. Its asking price of £53,898 is £2,720 above the AskCar estimate of £51,178. The AskCar estimate uses UK dealer asking prices, including 568 Mercedes-Benz S Class adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 159 days ago. Its asking price has since fallen by £5,000. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Arnold Clark Glasgow Corvette / Maserati / LUXE, based in Glasgow. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 7 November 2026.

How we estimate prices and check cars

Price

Fair price: £2,720 (5%) over the AskCar estimate of £51,178.

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 159 days.

Price history

AskCar first saw this advert on 1 June 2026 at £58,898. Its asking price is now £53,898, £5,000 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 1 June 2026: £58,898
• 17 July 2026: £56,898
• 13 October 2026: £54,898
• 4 November 2026: £53,898

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 2 June 2027.

It has had 3 MOTs. The latest, on 26 May 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 35,198 miles, which matches the advertised 35,211 miles.

Advertised mileage is about 7,400 miles lower than the median mileage of a 2021 Mercedes-Benz S Class on AskCar.

Similar cars

5 other 2021 Mercedes-Benz S Class AMG Line Premium 2.9 diesel automatic saloons are for sale at UK dealers, from £41,500 to £57,000, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz S Class AMG Line Premium, 2.9 diesel saloon, black. Mileage: 28,241 miles. Price: £56,898, £3,000 more than this car. Dealer: Arnold Clark Glasgow BMW in Glasgow. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2021-24b49b3bf7e8
• 2021 Mercedes-Benz S Class AMG Line Premium, 2.9 diesel saloon, black. Mileage: 42,881 miles. Price: £55,000, £1,102 more than this car. Dealer: Wootton Motor Company in King's Lynn. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2021-0d760726748c
• 2021 Mercedes-Benz S Class AMG Line Premium, 2.9 diesel saloon, black. Mileage: 26,000 miles. Price: £57,000, £3,102 more than this car. Dealer: Sytner Group Mercedes-Benz of Loughton in Loughton. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2021-1239e604d862