2021 Mercedes-Benz CLS 2.9 CLS400d AMG Line Night Edition Premium Plus

Price: £30,495. Fair price: £257 (under 1%) under the AskCar estimate of £30,752, our expected asking price for this car from its model, age, mileage and specification, drawing on 310 priced Mercedes-Benz CLS adverts on AskCar as of 8 November 2026.

AskCar lists 330 used Mercedes-Benz CLS from 270 UK dealerships, as of 8 November 2026.

Overview

  • Make: Mercedes-Benz
  • Model: CLS
  • Trim: AMG Line Night Edition Premium Plus
  • Version: 2.9 CLS400d AMG Line Night Edition Premium Plus G-Tronic 4WD Euro 6 (s/s) 4dr Coupe (325 bhp)
  • Year: 2021
  • Mileage: 43,904 miles
  • Fuel: Diesel
  • Body: Saloon, 4 doors, 5 seats
  • Engine: 2.9 litres, 325 bhp
  • Gearbox: Automatic (G-Tronic)
  • Drive: Four-wheel drive
  • Colour: Grey
  • CO2: 191 g/km
  • Emissions standard: Euro 6, ULEZ compliant

About this car

At 43,904 miles, this 2021 Mercedes-Benz CLS AMG Line Night Edition Premium Plus has covered about 3,200 fewer miles than other 2021 Mercedes-Benz CLS cars. Its asking price of £30,495 is £257 below the AskCar estimate of £30,752. To work out the AskCar estimate, we analyse UK dealer adverts for 310 Mercedes-Benz CLS cars across different ages and specifications. Since we first spotted the advert 5 days ago, the asking price has dropped by £304. Its advertised mileage matches the government's MOT record. It is for sale at Stoneacre in Rochdale. 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

Fair price: £257 (under 1%) under the AskCar estimate of £30,752.

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 310 priced Mercedes-Benz CLS adverts across different ages and specifications, as of 8 November 2026.

A 2021 Mercedes-Benz CLS with the 2.9 diesel engine is typically advertised at £30,200: the median of the 12 for sale on AskCar, as of 8 November 2026.

Time on sale

AskCar first saw this 2021 Mercedes-Benz CLS advertised 5 days ago.

Price history

AskCar first saw this advert on 3 November 2026 at £30,799. Its asking price is now £30,495, £304 less. The latest price cut was seen on 7 November 2026.

Price changes recorded:

  • 3 November 2026: £30,799
  • 7 November 2026: £30,495

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 23 November 2026.

It has had 5 MOTs. The latest, on 14 November 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 39,075 miles, which matches the advertised 43,904 miles.

Advertised mileage is about 3,200 miles lower than the median mileage of a 2021 Mercedes-Benz CLS on AskCar.

Similar cars

9 other 2021 Mercedes-Benz CLS AMG Line Night Edition Premium Plus 2.9 diesel automatic saloons are for sale at UK dealers, from £25,995 to £34,995, as of 8 November 2026.

The 3 closest to this car in mileage:

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

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Photos

35 photos of this car are on its AskCar page.

As of 8 November 2026, AskCar lists 595,629 cars and vans from 12,891 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.