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: 65,560 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 161 bhp
• Gearbox: Automatic (DCT)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 163 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 65,560 miles, this 2021 Mercedes-Benz GLB AMG Line has covered about 18,700 more miles than other 2021 Mercedes-Benz GLB cars. Its asking price of £18,495 is £187 below the AskCar estimate of £18,682. The AskCar estimate uses 822 UK dealer adverts for the Mercedes-Benz GLB, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 80 days ago. Its asking price has since fallen by £100. The government's MOT record matches its advertised mileage. It is advertised by Motoroo in Upminster. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 8 November 2026.

How we estimate prices and check cars

Price

Fair price: £187 (1%) under the AskCar estimate of £18,682.

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 822 priced Mercedes-Benz GLB adverts across different ages and specifications, as of 8 November 2026.

A 2021 Mercedes-Benz GLB with the 1.3 petrol engine is typically advertised at £21,000: the median of the 51 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2021 Mercedes-Benz GLB has been on sale for at least 80 days.

Price history

AskCar first saw this advert on 20 August 2026 at £18,595. Its asking price is now £18,495, £100 less. The latest price cut was seen on 25 August 2026.

Price changes recorded:

• 20 August 2026: £18,595
• 25 August 2026: £18,495

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 1 July 2027.

It has had 3 MOTs. The latest, on 1 July 2026, passed.

Advisories at the latest test: nearside front suspension arm ball joint has slight play; front tyre worn close to legal limit/worn on edge both sides.

Mileage at that test: 61,825 miles, which matches the advertised 65,560 miles.

Advertised mileage is about 18,700 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 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, black. Mileage: 62,621 miles. Price: £18,070, £425 less than this car. Dealer: Big Motoring World Blue Bell Hill in Blue Bell Hill. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-d5e073fadbeb
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, red. Mileage: 69,614 miles. Price: £17,891, £604 less than this car. Dealer: Stratstone Mercedes-Benz of Glasgow in Glasgow. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-19594d37d2c8
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, red. Mileage: 70,487 miles. Price: £18,495, the same price as this car. Dealer: Just Audi VW in Lincoln. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-df6fe025c63e

• The nearest: 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, grey, 15 miles from this car. Mileage: 30,987 miles. Price: £21,999, £3,504 more than this car. Dealer: Gates Of Woodford in Woodford. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-824652727522