2021 Mercedes-Benz GLB AMG Line Premium Plus
Version: AMG Line Premium Plus DCT Euro 6 5dr
Price: £33,495. Fair price: £1,135 (3%) over the AskCar estimate of £32,360, our expected asking price for this car from its model, age, mileage and specification, drawing on 860 priced Mercedes-Benz GLB adverts on AskCar as of 30 October 2026.
AskCar lists 873 used Mercedes-Benz GLB from 399 UK dealerships, as of 30 October 2026.
Overview
- Make
- Mercedes-Benz
- Model
- GLB
- Trim
- AMG Line Premium Plus
- Version
- AMG Line Premium Plus DCT Euro 6 5dr
- Mileage
- 10,947 miles
- Year
- 2021
- Fuel type
- Petrol
- Body type
- SUV
- Gearbox
- Automatic
- Seats
- 7
- CO2
- 167 g/km
- Colour
- Grey
- Doors
- 5
- Gearbox version
- DCT
- Hybrid type
- Mild hybrid
- Emissions standard
- Euro 6
About this car
This 2021 Mercedes-Benz GLB AMG Line Premium Plus is advertised with 10,947 miles, approximately 34,700 below the typical mileage for its age. The AskCar estimate for this car is £32,360. It is priced at £33,495, which is £1,135 above that estimate. The AskCar estimate uses 860 UK dealer adverts for the Mercedes-Benz GLB, with adjustments for age, mileage, trim, engine and other specifications. It first appeared in our advert records today. The seller is Sinclair Volkswagen (Swansea), based in Swansea.
Stock data as of 30 October 2026.
Price history
AskCar first saw this advert on 30 October 2026.
| Date observed | Asking price |
|---|---|
| 30 October 2026 | £33,495 |
Price and mileage comparison
Fair price: £1,135 (3%) over the AskCar estimate of £32,360.
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 860 priced Mercedes-Benz GLB adverts across different ages and specifications, as of 30 October 2026.
Advertised mileage is about 34,700 miles lower than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.
Other matching cars
8 other 2021 Mercedes-Benz GLB AMG Line Premium Plus automatic petrol cars are for sale at UK dealers from £20,999 to £25,450, as of 30 October 2026.
The 5 cheapest:
- 2021 Mercedes-Benz GLB. Price: £20,999. Mileage: 78,200 miles. Dealer: Sapphire Motors in London. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-b05398cd380b
- 2021 Mercedes-Benz GLB. Price: £22,990. Mileage: 43,100 miles. Dealer: Lkc Motors in Worksop. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-a16fa2adbed2
- 2021 Mercedes-Benz GLB. Price: £23,499. Mileage: 34,626 miles. Dealer: Prestige Motor Trader in Croydon. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-7481582e1d18
- 2021 Mercedes-Benz GLB. Price: £23,800. Mileage: 35,883 miles. Dealer: Vertu Mercedes Ascot in Ascot. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-cbebb103de17
- 2021 Mercedes-Benz GLB. Price: £24,275. Mileage: 49,368 miles. Dealer: JMV Cars Ltd of Shorne in Gravesend. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-4e052276f7ac
The 8 matching cars have covered 20,863 to 78,200 miles, compared with 10,947 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 GLB cars for sale · 2021 Mercedes-Benz GLB price guide
More like this
How to contact the dealer and its opening hours are on this AskCar page.
As of 30 October 2026, AskCar lists 580,490 cars and vans from 12,695 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.