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: 54,761 miles
• Fuel: Diesel
• Body: Coupe, 4 doors, 5 seats
• Engine: 2.9 litres, 325 bhp
• Gearbox: Automatic (9G-Tronic)
• Drive: Four-wheel drive
• Colour: Red
• CO2: 191 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 54,761 miles on the clock, this 2021 Mercedes-Benz CLS AMG Line has done roughly 7,600 more miles than a typical 2021 Mercedes-Benz CLS. Its asking price of £26,220 is £1,997 below the AskCar estimate of £28,217. The AskCar estimate uses UK dealer asking prices, including 310 Mercedes-Benz CLS adverts, and accounts for the car’s age, mileage and specification. Since we first spotted the advert 164 days ago, the asking price has dropped by £3,720. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Evans Halshaw MG Grantham, based in Grantham. 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: £1,997 (7%) under the AskCar estimate of £28,217.

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 164 days.

Price history

AskCar first saw this advert on 28 May 2026 at £29,940. Its asking price is now £26,220, £3,720 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 28 May 2026: £29,940
• 16 June 2026: £29,720
• 22 June 2026: £29,460
• 7 July 2026: £29,170
• 13 July 2026: £28,820
• 4 August 2026: £27,999
• 5 September 2026: £27,900
• 11 September 2026: £27,500
• 16 September 2026: £27,430
• 22 September 2026: £27,360
• 29 September 2026: £27,290
• 7 October 2026: £27,020
• 13 October 2026: £26,950
• 20 October 2026: £26,420
• 27 October 2026: £26,220

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 13 February 2027.

It has had 3 MOTs. The latest, on 12 February 2026, passed.

Advisories at the latest test: front brake disc worn, pitted or scored, but not seriously weakened both sides; rear brake disc worn, but not excessively both sides.

Mileage at that test: 51,957 miles, which matches the advertised 54,761 miles.

Advertised mileage is about 7,600 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 8 November 2026.

The closest to this car in mileage:

• 2021 Mercedes-Benz CLS AMG Line, 2.9 diesel coupe, grey. Mileage: 55,680 miles. Price: £25,699, £521 less than this car. Dealer: Fords Of Winsford Car Supermarket in Winsford. AskCar page: https://askcar.co.uk/car/mercedes-benz-cls-2021-2e240eaa5714