2021 Mercedes-Benz CLS 2.9 CLS400d AMG Line

Overview

• Make: Mercedes-Benz
• Model: CLS
• Trim: AMG Line
• Version: 2.9 400d AMG Line 9G-Tronic 4WD Euro 6 4dr Ngt Ed Pr + (325 bhp)
• Year: 2021
• Mileage: 55,680 miles
• Fuel: Diesel
• Body: Coupe, 4 doors, 5 seats
• Engine: 2.9 litres, 325 bhp
• Gearbox: Automatic (9G-Tronic)
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 191 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz CLS AMG Line has covered 55,680 miles, around 10,700 more miles than is typical for its age. The dealer is asking £25,799, which is £2,383 below the AskCar estimate of £28,182. To work out the AskCar estimate, we analyse UK dealer adverts for 312 Mercedes-Benz CLS cars across different ages and specifications. We first recorded this advert 163 days ago, and its asking price has since fallen by £3,100. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Fords Of Winsford Car Supermarket, based in Winsford. 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

Good value: £2,383 (8%) under the AskCar estimate of £28,182.

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 £28,899. Its asking price is now £25,799, £3,100 less. The latest price cut was seen on 1 November 2026.

Price changes recorded:

• 28 May 2026: £28,899
• 7 June 2026: £28,799
• 16 June 2026: £28,599
• 21 June 2026: £28,699
• 24 June 2026: £28,599
• 26 June 2026: £28,199
• 30 June 2026: £28,499
• 4 July 2026: £28,399
• 8 July 2026: £28,199
• 12 July 2026: £28,399
• 16 July 2026: £28,299
• 19 July 2026: £28,199
• 23 July 2026: £28,099
• 27 July 2026: £27,999
• 30 July 2026: £27,899
• 3 August 2026: £27,799
• 5 August 2026: £27,999
• 6 August 2026: £27,799
• 9 August 2026: £27,699
• 13 August 2026: £27,599
• 18 August 2026: £27,499
• 21 August 2026: £27,299
• 24 August 2026: £26,999
• 27 August 2026: £26,699
• 30 August 2026: £26,399
• 2 September 2026: £26,199
• 6 September 2026: £25,999
• 8 September 2026: £26,199
• 20 September 2026: £25,999
• 22 September 2026: £26,199
• 25 September 2026: £26,099
• 2 October 2026: £26,199
• 6 October 2026: £26,399
• 13 October 2026: £26,099
• 17 October 2026: £26,299
• 21 October 2026: £25,999
• 24 October 2026: £25,699
• 26 October 2026: £25,899
• 29 October 2026: £25,999
• 1 November 2026: £25,799

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 3 April 2027.

It has had 3 MOTs. The latest, on 4 April 2026, passed.

Advisories at the latest test: nearside rear inner road wheel slightly distorted edge.

Mileage at that test: 55,202 miles, which matches the advertised 55,680 miles.

Advertised mileage is about 10,700 miles higher than the median mileage of a 2021 Mercedes-Benz CLS on AskCar.

Similar cars

1 other 2021 Mercedes-Benz CLS AMG Line 2.9 diesel automatic coupe is for sale at UK dealers, as of 7 November 2026.

The closest to this car in mileage:

• 2021 Mercedes-Benz CLS AMG Line, 2.9 diesel coupe, red. Mileage: 54,761 miles. Price: £26,220, £421 more than this car. Dealer: Evans Halshaw MG Grantham in Grantham. AskCar page: https://askcar.co.uk/car/mercedes-benz-cls-2021-c916928ce58f