2021 Mercedes-Benz GLB

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

£20,490

Fair price: within 8% of the typical £21,067 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
38,250 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
Red
Doors
5
Driven wheels
Front Wheel Drive
Gearbox version
DCT
Engine badge
GLB200
Emissions standard
Euro 6

About this car

At 38,250 miles, this 2021 Mercedes-Benz GLB AMG Line has covered about 4,900 fewer miles than other 2021 Mercedes-Benz GLB cars. Our estimated market asking price is £21,067. This car is advertised at £20,490, which is £577 below that figure. 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 50 days ago, the asking price has dropped by £650. Its recorded MOT is valid until 30 November 2026, and its advertised mileage is consistent with the latest MOT reading. It is advertised by Big Motoring World in Chelmsford.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 4 September 2026, 50 days ago. Advert duration calculated on 24 October 2026. Net asking-price reduction: £650 from the first recorded £21,140. 30 price reductions recorded, the latest observed on 23 October 2026.

Recorded asking prices
Date observedAsking price
4 September 2026£21,140
5 September 2026£21,120
8 September 2026£21,110
9 September 2026£21,120
11 September 2026£21,100
12 September 2026£21,090
15 September 2026£21,100
16 September 2026£21,110
17 September 2026£21,100
19 September 2026£21,090
20 September 2026£21,070
22 September 2026£21,060
23 September 2026£21,070
24 September 2026£21,060
25 September 2026£21,030
26 September 2026£21,000
27 September 2026£20,980
29 September 2026£20,930
30 September 2026£20,880
1 October 2026£20,890
3 October 2026£20,860
4 October 2026£20,840
6 October 2026£20,820
7 October 2026£20,800
8 October 2026£20,790
9 October 2026£20,750
10 October 2026£20,730
11 October 2026£20,700
13 October 2026£20,670
14 October 2026£20,640
16 October 2026£20,610
17 October 2026£20,590
18 October 2026£20,580
19 October 2026£20,530
21 October 2026£20,500
23 October 2026£20,490

Price and mileage comparison

Estimated market asking price: £21,067. The asking price is £577 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 4,900 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 November 2026. 28,803 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 38,250 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

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.