2021 Mercedes-Benz C Class 1.9 C300d AMG Line Edition
Price: £22,999. Fair price: £656 (2%) over the AskCar estimate of £22,343, our expected asking price for this car from its model, age, mileage and specification, drawing on 4,608 priced Mercedes-Benz C Class adverts on AskCar as of 10 November 2026.
AskCar lists 4,866 used Mercedes-Benz C Class from 2,346 UK dealerships, as of 10 November 2026.
Overview
- Make: Mercedes-Benz
- Model: C Class
- Trim: AMG Line
- Version: 1.9 C300d AMG Line 9G-Tronic 4WD Euro 6 2dr Ed Premium (241 bhp)
- Year: 2021
- Mileage: 51,014 miles
- Fuel: Diesel
- Body: Coupe, 2 doors, 4 seats
- Engine: 1.9 litres, 241 bhp
- Gearbox: Automatic (9G-Tronic)
- Drive: Four-wheel drive
- Colour: Blue
- CO2: 150 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2021 Mercedes-Benz C Class AMG Line has covered 51,014 miles, around 5,800 more miles than is typical for its age. The dealer is asking £22,999, which is £656 above the AskCar estimate of £22,343. To work out the AskCar estimate, we analyse UK dealer adverts for 4,608 Mercedes-Benz C Class cars across different ages and specifications. This car was first seen in our listings data 19 days ago. Its advertised mileage matches the government's MOT record. The seller is Castle Motors, based in Fleet. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 10 November 2026.
Castle Motors is rated 4.9 out of 5 on Google.
Price
Fair price: £656 (2%) over the AskCar estimate of £22,343.
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 4,608 priced Mercedes-Benz C Class adverts across different ages and specifications, as of 10 November 2026.
Time on sale
This 2021 Mercedes-Benz C Class has been on sale for at least 19 days.
Price history
AskCar first saw this advert on 22 October 2026 at £22,999. Its asking price has not changed.
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 10 November 2026: valid until 28 July 2027.
It has had 4 MOTs. The latest, on 27 July 2026, passed.
Advisories at the latest test: offside play in steering rack inner joint(s).
Mileage at that test: 49,294 miles, which matches the advertised 51,014 miles.
Advertised mileage is about 5,800 miles higher than the median mileage of a 2021 Mercedes-Benz C Class on AskCar.
Browse all Mercedes-Benz C Class cars for sale · 2021 Mercedes-Benz C Class price guide
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Photos
15 photos of this car are on its AskCar page.
As of 10 November 2026, AskCar lists 591,054 cars and vans from 12,888 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.