2020 Mercedes-Benz C Class 2.0 C300d AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: C Class
• Trim: AMG Line Premium
• Version: 2.0 C300d AMG Line Premium G-Tronic+ RWD Euro 6 (s/s) 2dr Cabriolet (242 bhp)
• Year: 2020
• Mileage: 32,871 miles
• Fuel: Diesel
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 242 bhp
• Gearbox: Automatic (G-Tronic+)
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 138 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2020 Mercedes-Benz C Class AMG Line Premium has covered 32,871 miles, around 15,100 fewer miles than is typical for its age. Priced at £21,695, it is advertised £1,149 above the AskCar estimate of £20,546. To work out the AskCar estimate, we analyse UK dealer adverts for 4,562 Mercedes-Benz C Class cars across different ages and specifications. The asking price is now £1,298 lower than when we first recorded the advert 30 days ago. Its advertised mileage matches the government's MOT record. The seller is Group 1 Automotive Mercedes-Benz Of Derby, based in Derby. 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: £1,149 (5%) over the AskCar estimate of £20,546.

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 4,562 priced Mercedes-Benz C Class adverts across different ages and specifications, as of 8 November 2026.

A 2020 Mercedes-Benz C Class with the 2.0 diesel engine is typically advertised at £17,500: the median of the 127 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2020 Mercedes-Benz C Class has been on sale for at least 30 days.

Price history

AskCar first saw this advert on 9 October 2026 at £22,993. Its asking price is now £21,695, £1,298 less. The latest price cut was seen on 5 November 2026.

Price changes recorded:

• 9 October 2026: £22,993
• 10 October 2026: £22,295
• 30 October 2026: £21,850
• 5 November 2026: £21,695

Mileage and MOT

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

It has had 6 MOTs. The latest, on 9 October 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 32,699 miles, which matches the advertised 32,871 miles.

Advertised mileage is about 15,100 miles lower than the median mileage of a 2020 Mercedes-Benz C Class on AskCar.

Similar cars

7 other 2020 Mercedes-Benz C Class AMG Line Premium 2.0 diesel automatic convertibles are for sale at UK dealers, from £15,682 to £23,700, as of 8 November 2026.

The 3 closest to this car in mileage:

• 2020 Mercedes-Benz C Class AMG Line Premium, 2.0 diesel convertible, grey. Mileage: 32,575 miles. Price: £21,499, £196 less than this car. Dealer: Kennedy Bros in Rotherfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-c-class-2020-c27d235c34fb
• 2020 Mercedes-Benz C Class AMG Line Premium, 2.0 diesel convertible, blue. Mileage: 39,201 miles. Price: £18,950, £2,745 less than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/mercedes-benz-c-class-2020-a62e1b55bba7
• 2020 Mercedes-Benz C Class AMG Line Premium, 2.0 diesel convertible, silver. Mileage: 20,002 miles. Price: £23,700, £2,005 more than this car. Dealer: Group 1 Automotive Mercedes-Benz of Nottingham in Nottingham. AskCar page: https://askcar.co.uk/car/mercedes-benz-c-class-2020-94c5ed109c52