2021 Mercedes-Benz GLB

1.3 GLB200 AMG Line DCT FWD Euro 6 (s/s) 5dr 7G (161 bhp)

£18,800

Fair price: within 8% of the typical £19,814 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 GLB200 AMG Line DCT FWD Euro 6 (s/s) 5dr 7G (161 bhp)
Mileage
50,886 miles
Year
2021
Fuel type
Petrol
Body type
SUV
Engine
1.3 L
Gearbox
Automatic
Power
161 bhp
Seats
7
CO2
163 g/km
Colour
Black
Doors
5
Driven wheels
Front Wheel Drive
Gearbox version
DCT
Engine badge
GLB200
Emissions standard
Euro 6

About this car

At 50,886 miles, this 2021 Mercedes-Benz GLB AMG Line has covered about 7,800 more miles than other 2021 Mercedes-Benz GLB cars. Its asking price of £18,800 is £1,014 below our estimate of £19,814. We use UK dealer asking prices, including 876 Mercedes-Benz GLB listings, and account for the car’s age, mileage and specification. Since we first spotted the advert 58 days ago, the asking price has dropped by £950. Its recorded MOT is valid until 27 March 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is Car Planet Watford, based in Rickmansworth.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 28 August 2026, 58 days ago. Advert duration calculated on 25 October 2026. Net asking-price reduction: £950 from the first recorded £19,750. 5 price reductions recorded, the latest observed on 11 October 2026.

Recorded asking prices
Date observedAsking price
28 August 2026£19,750
17 September 2026£19,550
23 September 2026£19,400
28 September 2026£19,200
5 October 2026£19,000
11 October 2026£18,800
23 October 2026£18,800

Price and mileage comparison

Estimated market asking price: £19,814. The asking price is £1,014 below 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 7,800 miles higher than typical for a 2021 Mercedes-Benz GLB.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 27 March 2027. 47,552 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 priceMileage
£15,795101,000 miles
£15,99095,412 miles
£16,80087,258 miles
£18,19971,750 miles
£18,49565,560 miles

These cars have covered 19,431–101,000 miles, compared with 50,886 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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