2021 Mercedes-Benz GLB

2.0 AMG Line Premium Auto Euro 6 5dr

£21,200

Fair price: within 8% of the typical £20,676 for this model, age and mileage, drawing on 876 adverts of this make and model.

Overview

Make
Mercedes-Benz
Model
GLB
Trim
AMG LINE PREMIUM
Version
2.0 AMG Line Premium Auto Euro 6 5dr
Mileage
68,280 miles
Year
2021
Fuel type
Diesel
Body type
SUV
Engine
2.0 L
Gearbox
Automatic
CO2
164 g/km
Colour
Black
Doors
5
Emissions standard
Euro 6

About this car

This 2021 Mercedes-Benz GLB AMG Line Premium is advertised with 68,280 miles, approximately 25,200 above the typical mileage for its age. The dealer is asking £21,200, which is £524 above our market estimate of £20,676. To estimate its market asking price, we analyse UK dealer adverts for 876 Mercedes-Benz GLB cars across different ages and specifications. We first saw this car advertised 18 days ago. Its asking price has since fallen by £1,300. MOT records show an expiry date of 9 January 2027, and the latest recorded mileage is consistent with the advert. The seller is Sytner Select Swindon, based in Swindon.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 8 October 2026, 18 days ago. Advert duration calculated on 26 October 2026. Net asking-price reduction: £1,300 from the first recorded £22,500. 1 price reduction recorded, the latest observed on 15 October 2026.

Recorded asking prices
Date observedAsking price
8 October 2026£22,500
15 October 2026£21,200
23 October 2026£21,200

Price and mileage comparison

Estimated market asking price: £20,676. The asking price is £524 above this estimate.

The estimate uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It estimates an advertised price, not a confirmed sale price.

The pricing calculation includes 876 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 25,200 miles higher than typical for a 2021 Mercedes-Benz GLB.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 9 January 2027. 57,364 miles at the last test.

18 other cars with the same year, trim, gearbox and fuel are for sale from £20,464 to £24,995.

Other matching cars (up to five, cheapest first)
Asking priceMileage
£20,46464,540 miles
£20,46464,540 miles
£20,79063,650 miles
£20,97571,128 miles
£21,30048,203 miles

These cars have covered 28,606–71,128 miles, compared with 68,280 miles for this car.

Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. Our estimate adjusts for these differences using the wider market data.

Browse all Mercedes-Benz GLB cars for sale · 2021 Mercedes-Benz GLB price guide

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