2021 Mercedes-Benz S Class

2.9 S350d AMG Line Auto RWD Euro 6 4dr (281 bhp)

£46,989

Fair price: within 8% of the typical £49,140 for this model, age and mileage, drawing on 544 adverts of this make and model.

Overview

Make: Mercedes-Benz
Model: S Class
Trim: AMG LINE
Version: 2.9 S350d AMG Line Auto RWD Euro 6 4dr (281 bhp)
Mileage: 51,128 miles
Year: 2021
Fuel type: Diesel
Body type: Saloon
Engine: 2.9 L
Gearbox: Automatic
Power: 281 bhp
Seats: 5
CO2: 173 g/km
Colour: Black
Doors: 4
Driven wheels: Rear Wheel Drive
Engine badge: S350d
Emissions standard: Euro 6

About this car

This 2021 Mercedes-Benz S Class AMG Line has covered 51,128 miles, around 11,300 more than typical for its age. Our estimated market asking price is £49,140. This car is advertised at £46,989, which is £2,151 below that figure. Our estimate draws on 544 Mercedes-Benz S Class adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. Since we first spotted the advert 149 days ago, the asking price has dropped by £2,000. It may give you a starting point for a conversation about price. The latest MOT record shows an expiry date of 13 May 2027, with the advertised mileage consistent with the recorded reading. You can find this car at Essex Prestige in Harlow.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 28 May 2026, 149 days ago. Advert duration calculated on 24 October 2026. Net asking-price reduction: £2,000 from the first recorded £48,989. 2 price reductions recorded, the latest observed on 30 August 2026.

Recorded asking prices
Date observed	Asking price
28 May 2026	£48,989
4 July 2026	£47,989
7 July 2026	£47,989
30 August 2026	£46,989
23 October 2026	£46,989

Price and mileage comparison

Estimated market asking price: £49,140. The asking price is £2,151 below this estimate.

The estimate uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It estimates an advertised price, not a confirmed sale price.

The pricing calculation includes 544 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 11,300 miles higher than typical for a 2021 Mercedes-Benz S Class.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 13 May 2027. 51,221 miles at the last test.

5 other cars with the same year, trim, gearbox and fuel are for sale from £37,995 to £56,890.

Other matching cars
Asking price	Mileage
£37,995	100,778 miles
£40,900	80,516 miles
£49,995	66,900 miles
£49,995	34,509 miles
£56,890	22,000 miles

These cars have covered 22,000–100,778 miles, compared with 51,128 miles for this car.

Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. Our estimate adjusts for these differences using the wider market data.

Browse all Mercedes-Benz S Class cars for sale · 2021 Mercedes-Benz S Class price guide

How to contact the dealer, its opening hours and the cheaper cars like this one are on this AskCar page.

Vehicle photos

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