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

Price: £30,475. Fair price: £1,924 (5%) under the AskCar estimate of £32,399, our expected asking price for this car from its model, age, mileage and specification, drawing on 312 priced Mercedes-Benz CLS adverts on AskCar as of 7 November 2026.

AskCar lists 334 used Mercedes-Benz CLS from 274 UK dealerships, as of 7 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: 35,192 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 35,192 miles, this 2021 Mercedes-Benz CLS AMG Line Night Edition Premium Plus has covered about 9,800 fewer miles than other 2021 Mercedes-Benz CLS cars. Priced at £30,475, it is advertised £1,924 below the AskCar estimate of £32,399. To work out the AskCar estimate, we analyse UK dealer adverts for 312 Mercedes-Benz CLS cars across different ages and specifications. Since we first spotted the advert 163 days ago, the asking price has dropped by £5,000. Its advertised mileage matches the government's MOT record. You can find this car at The Car Co in Bury. 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: £1,924 (5%) under the AskCar estimate of £32,399.

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 312 priced Mercedes-Benz CLS adverts across different ages and specifications, as of 7 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 7 November 2026.

Time on sale

This 2021 Mercedes-Benz CLS has been on sale for at least 163 days.

Price history

AskCar first saw this advert on 28 May 2026 at £35,475. Its asking price is now £30,475, £5,000 less. The latest price cut was seen on 7 November 2026.

Price changes recorded:

  • 29 May 2026: £35,475
  • 4 June 2026: £34,975
  • 16 July 2026: £34,475
  • 18 July 2026: £33,975
  • 8 August 2026: £33,475
  • 30 August 2026: £32,975
  • 6 September 2026: £32,475
  • 13 September 2026: £31,975
  • 11 October 2026: £31,475
  • 17 October 2026: £30,975
  • 7 November 2026: £30,475

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 14 April 2027.

It has had 3 MOTs. The latest, on 15 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 35,195 miles, which matches the advertised 35,192 miles.

Advertised mileage is about 9,800 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 7 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

60 photos of this car are on its AskCar page.

As of 7 November 2026, AskCar lists 601,018 cars and vans from 12,892 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.