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

Price: £30,990. Fair price: £428 (1%) over the AskCar estimate of £30,562, 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: 45,000 miles
  • Fuel: Diesel
  • Body: Saloon, 4 doors, 5 seats
  • Engine: 2.9 litres, 325 bhp
  • Gearbox: Automatic (G-Tronic)
  • Drive: Four-wheel drive
  • Colour: Black
  • CO2: 191 g/km
  • Emissions standard: Euro 6, ULEZ compliant

About this car

With 45,000 miles on the clock, this 2021 Mercedes-Benz CLS AMG Line Night Edition Premium Plus has done roughly 2,100 fewer miles than a typical 2021 Mercedes-Benz CLS. The AskCar estimate for this car is £30,562. It is priced at £30,990, which is £428 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 310 Mercedes-Benz CLS cars across different ages and specifications. We first recorded this advert 92 days ago, and its asking price has since fallen by £1,000. The government's MOT record matches its advertised mileage. It is advertised by LTV in Bury. 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: £428 (1%) over the AskCar estimate of £30,562.

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

This 2021 Mercedes-Benz CLS has been on sale for at least 92 days.

Price history

AskCar first saw this advert on 8 August 2026 at £31,990. Its asking price is now £30,990, £1,000 less. The latest price cut was seen on 29 September 2026.

Price changes recorded:

  • 8 August 2026: £31,990
  • 26 September 2026: £31,490
  • 29 September 2026: £30,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 16 June 2027.

It has had 3 MOTs. The latest, on 27 May 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 44,067 miles, which matches the advertised 45,000 miles.

Advertised mileage is about 2,100 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

77 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.