2021 Mercedes-Benz GLB

1.3 AMG Line Auto FWD Euro 6 5dr (160 bhp)

£21,150

Fair price: within 8% of the typical £21,007 for this model, age and mileage, drawing on 876 adverts of this make and model.

Overview

Make: Mercedes-Benz
Model: GLB
Trim: AMG LINE
Version: 1.3 AMG Line Auto FWD Euro 6 5dr (160 bhp)
Mileage: 38,809 miles
Year: 2021
Fuel type: Petrol
Body type: SUV
Engine: 1.3 L
Gearbox: Automatic
Power: 160 bhp
Seats: 7
CO2: 163 g/km
Colour: Blue
Doors: 5
Driven wheels: Front Wheel Drive
Engine badge: GLB200
Emissions standard: Euro 6

About this car

This 2021 Mercedes-Benz GLB AMG Line is advertised with 38,809 miles, approximately 4,300 below the typical mileage for its age. Its asking price of £21,150 is £143 above our estimate of £21,007. To estimate its market asking price, we analyse UK dealer adverts for 876 Mercedes-Benz GLB cars across different ages and specifications. We first recorded this car for sale 31 days ago. Its recorded MOT is valid until 30 May 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is Sytner Select Northampton, based in Northampton.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 24 September 2026, 31 days ago. Advert duration calculated on 25 October 2026.

Recorded asking prices
Date observed	Asking price
24 September 2026	£21,150
23 October 2026	£21,150

Price and mileage comparison

Estimated market asking price: £21,007. The asking price is £143 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 4,300 miles lower than typical for a 2021 Mercedes-Benz GLB.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 30 May 2027. 36,806 miles at the last test.

27 other cars with the same year, trim, gearbox and fuel are for sale from £15,795 to £23,000.

Other matching cars (up to five, cheapest first)
Asking price	Mileage
£15,795	101,000 miles
£15,990	95,412 miles
£16,800	87,258 miles
£18,199	71,750 miles
£18,495	65,560 miles

These cars have covered 19,431–101,000 miles, compared with 38,809 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

More like this

How to contact the dealer, its opening hours and the cheaper cars like this one are on this AskCar page.

Vehicle photos

AskCar lists 589,789 cars from 13,079 UK dealer locations, read and updated daily from dealer websites. More than any other UK site. No dealer pays to be listed.