2021 Mercedes-Benz S Class

2.9 S350d AMG Line 9G-Tronic RWD Euro 6 4dr (281 bhp)

£49,995

Fair price: within 8% of the typical £54,223 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 9G-Tronic RWD Euro 6 4dr (281 bhp)
Mileage: 34,509 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
Gearbox version: 9G-Tronic
Engine badge: S350d
Emissions standard: Euro 6

About this car

At 34,509 miles, this 2021 Mercedes-Benz S Class AMG Line has covered about 5,300 fewer miles than other 2021 Mercedes-Benz S Class cars. Our estimated market asking price is £54,223. This car is advertised at £49,995, which is £4,228 below that figure. To estimate its market asking price, we analyse UK dealer adverts for 544 Mercedes-Benz S Class cars across different ages and specifications. We first recorded this car for sale 18 days ago. Its recorded MOT is valid until 6 September 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is Agnew Group Mercedes-Benz Of Belfast, based in Belfast.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 8 October 2026, 18 days ago. Advert duration calculated on 26 October 2026.

Recorded asking prices
Date observed	Asking price
8 October 2026	£49,995
23 October 2026	£49,995

Price and mileage comparison

Estimated market asking price: £54,223. The asking price is £4,228 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 5,300 miles lower than typical for a 2021 Mercedes-Benz S Class.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 6 September 2027. 27,344 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
£46,989	51,128 miles
£49,995	66,900 miles
£56,890	22,000 miles

These cars have covered 22,000–100,778 miles, compared with 34,509 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

Vehicle photos

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