2021 Mercedes-Benz GLB 2.0 AMG Line Premium

Version: 2.0 AMG Line Premium Auto Euro 6 5dr

Price: £23,990. Fair price: £38 (under 1%) over the AskCar estimate of £23,952, 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
Version
2.0 AMG Line Premium Auto Euro 6 5dr
Mileage
39,500 miles
Year
2021
Fuel type
Diesel
Body type
SUV
Engine
2.0 L
Gearbox
Automatic
Seats
7
CO2
156 g/km
Colour
White
Doors
5
Emissions standard
Euro 6

About this car

This 2021 Mercedes-Benz GLB AMG Line Premium has covered 39,500 miles, around 6,200 fewer miles than is typical for its age. Priced at £23,990, it is advertised £38 above the AskCar estimate of £23,952. The AskCar estimate draws on 860 Mercedes-Benz GLB adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. This car was first seen in our listings data today. MOT records show an expiry date of 18 March 2027, and the latest recorded mileage is consistent with the advert. The seller is Group 1 Automotive Mercedes-Benz Of Kings Lynn, based in Kings Lynn.

Stock data as of 30 October 2026.

How we estimate prices and check cars

Price history

AskCar first saw this advert on 30 October 2026.

Recorded asking prices
Date observedAsking price
30 October 2026£23,990

Price and mileage comparison

Fair price: £38 (under 1%) over the AskCar estimate of £23,952.

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 6,200 miles lower than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT: valid until 18 March 2027. 31,167 miles at the last test.

Other matching cars

19 other 2021 Mercedes-Benz GLB AMG Line Premium automatic diesel cars are for sale at UK dealers from £15,950 to £24,995, as of 30 October 2026.

The 5 cheapest:

The 19 matching cars have covered 28,606 to 105,000 miles, compared with 39,500 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

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Photos

1 photo of this car is on its AskCar page.

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.