2021 Mercedes-Benz GLC AMG Line
Version: AMG Line Auto 4WD Euro 6 5dr
Price: £20,990. Good value: £3,757 (15%) under the AskCar estimate of £24,747, our expected asking price for this car from its model, age, mileage and specification, drawing on 2,798 priced Mercedes-Benz GLC adverts on AskCar as of 29 October 2026.
AskCar lists 2,831 used Mercedes-Benz GLC from 1,154 UK dealerships, as of 29 October 2026.
Overview
- Make
- Mercedes-Benz
- Model
- GLC
- Trim
- AMG Line
- Version
- AMG Line Auto 4WD Euro 6 5dr
- Mileage
- 57,593 miles
- Year
- 2021
- Fuel type
- Diesel
- Body type
- SUV
- Gearbox
- Automatic
- Seats
- 5
- Colour
- Grey
- Doors
- 5
- Driven wheels
- Four Wheel Drive
- Emissions standard
- Euro 6
About this car
This 2021 Mercedes-Benz GLC AMG Line has covered 57,593 miles, around 7,900 more miles than is typical for its age. The AskCar estimate for this car is £24,747. It is priced at £20,990, which is £3,757 below that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 2,798 Mercedes-Benz GLC cars across different ages and specifications. It first appeared in our advert records today. MOT records show an expiry date of 28 March 2027, and the latest recorded mileage is consistent with the advert. You can find this car at Endeavour Automotive in Letchworth.
Stock data as of 29 October 2026.
Price history
AskCar first saw this advert on 29 October 2026.
| Date observed | Asking price |
|---|---|
| 29 October 2026 | £20,990 |
Price and mileage comparison
Good value: £3,757 (15%) under the AskCar estimate of £24,747.
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 2,798 priced Mercedes-Benz GLC adverts across different ages and specifications, as of 29 October 2026.
Advertised mileage is about 7,900 miles higher than the median mileage of a 2021 Mercedes-Benz GLC on AskCar.
The advertised mileage is consistent with the last MOT reading.
MOT
MOT: valid until 28 March 2027. 48,557 miles at the last test.
Other matching cars
14 other 2021 Mercedes-Benz GLC AMG Line automatic diesel cars are for sale at UK dealers from £18,995 to £28,495, as of 29 October 2026.
The 5 cheapest:
- 2021 Mercedes-Benz GLC. Price: £18,995. Mileage: 89,497 miles. Dealer: Ilex Car Sales in Limavady. AskCar page: https://askcar.co.uk/car/mercedes-benz-glc-2021-cccbf6a27035
- 2021 Mercedes-Benz GLC. Price: £19,498. Mileage: 72,901 miles. Dealer: Eastern Western Motor Group Mercedes-Benz of Dunfermline in Dunfermline. AskCar page: https://askcar.co.uk/car/mercedes-benz-glc-2021-013441ed0ebf
- 2021 Mercedes-Benz GLC. Price: £20,579. Mileage: 63,091 miles. Dealer: Sandown Group Mercedes-Benz of Basingstoke in Basingstoke. AskCar page: https://askcar.co.uk/car/mercedes-benz-glc-2021-5c4c458c7bee
- 2021 Mercedes-Benz GLC. Price: £20,950. Mileage: 81,450 miles. Dealer: Prestige Sales and Consultancy in Bury St Edmunds. AskCar page: https://askcar.co.uk/car/mercedes-benz-glc-2021-6429cb4e1847
- 2021 Mercedes-Benz GLC. Price: £21,950. Mileage: 52,000 miles. Dealer: McCabe Autos in Belfast. AskCar page: https://askcar.co.uk/car/mercedes-benz-glc-2021-2deba159bc9d
The 14 matching cars have covered 26,500 to 89,497 miles, compared with 57,593 miles for this car.
Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. The AskCar estimate adjusts for these differences.
Browse all Mercedes-Benz GLC cars for sale · 2021 Mercedes-Benz GLC price guide
More like this
How to contact the dealer and its opening hours are on this AskCar page.
As of 29 October 2026, AskCar lists 587,923 cars and vans from 12,992 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.