2021 Mercedes-Benz GLB 1.3 GLB200 AMG Line

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)
• Year: 2021
• Mileage: 62,621 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 161 bhp
• Gearbox: Automatic (DCT)
• Drive: Front-wheel drive
• Colour: Black
• CO2: 163 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz GLB AMG Line is advertised with 62,621 miles, approximately 15,200 above the typical mileage for its age. The dealer is asking £18,110, which is £944 below the AskCar estimate of £19,054. To work out the AskCar estimate, we analyse UK dealer adverts for 841 Mercedes-Benz GLB cars across different ages and specifications. The asking price is now £40 lower than when we first recorded the advert 3 days ago. We checked its advertised mileage against the government's MOT record, and they match. The seller is Big Motoring World Enfield, based in Waltham Cross. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 7 November 2026.

How we estimate prices and check cars

Price

Fair price: £944 (4%) under the AskCar estimate of £19,054.

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 841 priced Mercedes-Benz GLB adverts across different ages and specifications, as of 7 November 2026.

A 2021 Mercedes-Benz GLB with the 1.3 petrol engine is typically advertised at £21,000: the median of the 52 for sale on AskCar, as of 7 November 2026.

Time on sale

AskCar first saw this 2021 Mercedes-Benz GLB advertised 3 days ago. About half of 2021 Mercedes-Benz GLB cars are gone from sale within a month of being advertised: 78 of the 161 first advertised between 8 July 2026 and 4 October 2026.

Price history

AskCar first saw this advert on 4 November 2026 at £18,150. Its asking price is now £18,110, £40 less. The latest price cut was seen on 6 November 2026.

Price changes recorded:

• 4 November 2026: £18,150
• 5 November 2026: £18,120
• 6 November 2026: £18,110

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 30 January 2027.

It has had 3 MOTs. The latest, on 26 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 50,765 miles, which matches the advertised 62,621 miles.

Advertised mileage is about 15,200 miles higher than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

Similar cars

25 other 2021 Mercedes-Benz GLB AMG Line 1.3 petrol automatic SUVs are for sale at UK dealers, from £15,795 to £22,595, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, grey. Mileage: 65,560 miles. Price: £18,495, £385 more than this car. Dealer: Motoroo in Basildon. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-0171ad620b6e
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, white. Mileage: 59,293 miles. Price: £18,186, £76 more than this car. Dealer: Quality Part X Dunstable in Dunstable. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-8c2277abc035
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, red. Mileage: 68,465 miles. Price: £17,891, £219 less than this car. Dealer: Stratstone Mercedes-Benz of Glasgow in Glasgow. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-19594d37d2c8

• The nearest: 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, grey, 7 miles from this car. Mileage: 30,987 miles. Price: £21,999, £3,889 more than this car. Dealer: Gates Of Woodford in Woodford. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-824652727522