2021 Mercedes-Benz B Class 1.3 AMG Line
Version: 1.3 AMG Line Auto FWD Euro 6 5dr
Price: £18,495. Fair price: £1,113 (5%) under the AskCar estimate of £19,608, our expected asking price for this car from its model, age, mileage and specification, drawing on 756 priced Mercedes-Benz B Class adverts on AskCar as of 31 October 2026.
AskCar lists 782 used Mercedes-Benz B Class from 616 UK dealerships, as of 31 October 2026.
Overview
- Make
- Mercedes-Benz
- Model
- B Class
- Trim
- AMG Line
- Version
- 1.3 AMG Line Auto FWD Euro 6 5dr
- Mileage
- 3,700 miles
- Year
- 2021
- Fuel type
- Petrol
- Body type
- MPV
- Engine
- 1.3 L
- Gearbox
- Automatic
- Seats
- 5
- CO2
- 140 g/km
- Colour
- White
- Doors
- 5
- Driven wheels
- Front Wheel Drive
- Engine badge
- AMG Line
- Emissions standard
- Euro 6
About this car
This 2021 Mercedes-Benz B Class AMG Line is advertised with 3,700 miles, approximately 26,300 below the typical mileage for its age. Priced at £18,495, it is advertised £1,113 below the AskCar estimate of £19,608. The AskCar estimate draws on 756 Mercedes-Benz B Class adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. It first appeared in our advert records today. MOT records show an expiry date of 4 March 2027, and the latest recorded mileage is consistent with the advert. The seller is Sandown Group Mercedes-Benz of Dorchester, based in Dorchester.
Stock data as of 31 October 2026.
Price history
AskCar first saw this advert on 31 October 2026.
| Date observed | Asking price |
|---|---|
| 31 October 2026 | £18,495 |
Price and mileage comparison
Fair price: £1,113 (5%) under the AskCar estimate of £19,608.
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 756 priced Mercedes-Benz B Class adverts across different ages and specifications, as of 31 October 2026.
Advertised mileage is about 26,300 miles lower than the median mileage of a 2021 Mercedes-Benz B Class on AskCar.
The advertised mileage is consistent with the last MOT reading.
MOT
MOT: valid until 4 March 2027. 3,624 miles at the last test.
Other matching cars
2 other 2021 Mercedes-Benz B Class AMG Line automatic petrol cars are for sale at UK dealers from £16,995 to £19,589, as of 31 October 2026.
- 2021 Mercedes-Benz B Class. Price: £16,995. Mileage: 39,579 miles. Dealer: Specialist Vehicles in Plymouth. AskCar page: https://askcar.co.uk/car/mercedes-benz-b-class-2021-ff1e0eda557b
- 2021 Mercedes-Benz B Class. Price: £19,589. Mileage: 20,380 miles. Dealer: D.g. Weaver in Rhondda. AskCar page: https://askcar.co.uk/car/mercedes-benz-b-class-2021-e53a495a4704
The 2 matching cars have covered 20,380 to 39,579 miles, compared with 3,700 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 B Class cars for sale · 2021 Mercedes-Benz B Class price guide
More like this
How to contact the dealer and its opening hours are on this AskCar page.
As of 31 October 2026, AskCar lists 583,548 cars and vans from 12,716 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.