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

Price: £30,891. Fair price: £527 (1%) under the AskCar estimate of £31,418, 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: 40,122 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

This 2021 Mercedes-Benz CLS AMG Line Night Edition Premium Plus has covered 40,122 miles, around 7,000 fewer miles than is typical for its age. The AskCar estimate for this car is £31,418. It is priced at £30,891, which is £527 below 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 saw this car advertised 19 days ago. Its asking price has since fallen by £657. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is LSH Auto Mercedes-Benz of Birmingham, based in Birmingham. 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: £527 (1%) under the AskCar estimate of £31,418.

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 19 days.

Price history

AskCar first saw this advert on 20 October 2026 at £31,548. Its asking price is now £30,891, £657 less. The latest price cut was seen on 5 November 2026.

Price changes recorded:

  • 20 October 2026: £31,548
  • 27 October 2026: £31,151
  • 5 November 2026: £30,891

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 9 October 2027.

It failed its MOT on 8 October 2026 (offside windscreen damaged but not adversely affecting driver's view zone A; offside front inner road wheel has a welding defect; nearside front tyre has a bulge, caused by separation or partial failure of its structure; and 1 more) and passed 2 days later, on 10 October 2026.

Advisories at the latest test: offside windscreen damaged but not adversely affecting driver's view zone A.

Mileage at that test: 39,678 miles, which matches the advertised 40,122 miles.

Advertised mileage is about 7,000 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:

  • The nearest: 2021 Mercedes-Benz CLS AMG Line Night Edition Premium Plus, 2.9 diesel saloon, grey, 18 miles from this car. Mileage: 53,720 miles. Price: £25,995, £4,896 less than this car. Dealer: V12 Sports & Classics Ltd - Hinckley in Hinckley. AskCar page: https://askcar.co.uk/car/mercedes-benz-cls-2021-2565b48296cf

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

More like this

Photos

58 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.