2021 Mercedes-Benz S Class 3.0 S500Lh MHEV AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: S Class
• Trim: AMG Line Premium
• Version: 3.0 S500Lh Mhev AMG Line Premium G-Tronic+ 4WD Euro 6 (s/s) 4dr (429 bhp)
• Year: 2021
• Mileage: 83,769 miles
• Fuel: Petrol, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 429 bhp
• Gearbox: Automatic (G-Tronic+)
• Drive: Four-wheel drive
• Colour: Black
• CO2: 199 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 83,769 miles on the clock, this 2021 Mercedes-Benz S Class AMG Line Premium has done roughly 41,200 more miles than a typical 2021 Mercedes-Benz S Class. The dealer is asking £42,841, which is £2,322 below the AskCar estimate of £45,163. To work out the AskCar estimate, we analyse UK dealer adverts for 568 Mercedes-Benz S Class cars across different ages and specifications. Since we first spotted the advert 163 days ago, the asking price has dropped by £6,815. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Quality Part X Dunstable, based in Dunstable. 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: £2,322 (5%) under the AskCar estimate of £45,163.

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 3.0 petrol engine is typically advertised at £53,900: the median of the 16 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 163 days.

Price history

AskCar first saw this advert on 28 May 2026 at £49,656. Its asking price is now £42,841, £6,815 less. The latest price cut was seen on 7 November 2026.

Price changes recorded:

• 29 May 2026: £49,656
• 30 May 2026: £49,651
• 2 June 2026: £49,646
• 4 June 2026: £49,641
• 9 June 2026: £49,500
• 8 September 2026: £49,495
• 10 September 2026: £49,480
• 16 September 2026: £49,400
• 18 September 2026: £49,385
• 20 September 2026: £49,030
• 21 September 2026: £48,700
• 24 September 2026: £48,695
• 29 September 2026: £48,600
• 1 October 2026: £48,550
• 3 October 2026: £48,000
• 8 October 2026: £47,996
• 10 October 2026: £47,900
• 13 October 2026: £44,700
• 16 October 2026: £44,500
• 20 October 2026: £44,400
• 24 October 2026: £44,351
• 27 October 2026: £44,346
• 28 October 2026: £43,000
• 29 October 2026: £42,996
• 5 November 2026: £42,991
• 7 November 2026: £42,841

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 16 February 2027.

It has had 4 MOTs. The latest, on 17 February 2026, passed.

Advisories at the latest test: rear tyre worn close to legal limit/worn on edge both inner edges.

Mileage at that test: 79,988 miles, which matches the advertised 83,769 miles.

Advertised mileage is about 41,200 miles higher than the median mileage of a 2021 Mercedes-Benz S Class on AskCar.

Similar cars

4 other 2021 Mercedes-Benz S Class AMG Line Premium 3.0 petrol automatic saloons are for sale at UK dealers, from £41,975 to £54,885, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz S Class AMG Line Premium, 3.0 petrol saloon, black. Mileage: 90,907 miles. Price: £41,975, £866 less than this car. Dealer: PCBS Sales in Tonbridge. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2021-cae8e030836d
• 2021 Mercedes-Benz S Class AMG Line Premium, 3.0 petrol saloon, black. Mileage: 65,000 miles. Price: £47,500, £4,659 more than this car. Dealer: Reverie Autos in Hatfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2021-508b191a0835
• 2021 Mercedes-Benz S Class AMG Line Premium, 3.0 petrol saloon, blue. Mileage: 28,582 miles. Price: £51,410, £8,569 more than this car. Dealer: Evans Halshaw BYD Rotherham in Rotherham. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2021-3075a4102fde