2021 Mercedes-Benz GLB 1.3 GLB200 AMG Line Premium Plus

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line Premium Plus
• Version: 1.3 AMG Line Premium Plus Auto FWD Euro 6 5dr (161 bhp)
• Year: 2021
• Mileage: 23,000 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 161 bhp
• Gearbox: Automatic
• Drive: Front-wheel drive
• Colour: Blue
• CO2: 164 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz GLB AMG Line Premium Plus has covered 23,000 miles, around 23,900 fewer miles than is typical for its age. Priced at £25,450, it is advertised £673 above the AskCar estimate of £24,777. To work out the AskCar estimate, we analyse UK dealer adverts for 822 Mercedes-Benz GLB cars across different ages and specifications. We first recorded this advert 125 days ago, and its asking price has since fallen by £1,500. Its advertised mileage matches the government's MOT record. You can find this car at Jamjar Cars in St. Albans. 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: £673 (2%) over the AskCar estimate of £24,777.

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 125 days.

Price history

AskCar first saw this advert on 6 July 2026 at £26,950. Its asking price is now £25,450, £1,500 less. The latest price cut was seen on 19 September 2026.

Price changes recorded:

• 6 July 2026: £26,950
• 23 July 2026: £26,450
• 11 August 2026: £25,950
• 19 September 2026: £25,450

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 19 December 2026.

It has had 2 MOTs. The latest, on 8 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 18,565 miles, which matches the advertised 23,000 miles.

Advertised mileage is about 23,900 miles lower than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

Similar cars

7 other 2021 Mercedes-Benz GLB AMG Line Premium Plus 1.3 petrol automatic SUVs are for sale at UK dealers, from £19,994 to £24,698, as of 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line Premium Plus, 1.3 petrol SUV, white. Mileage: 20,863 miles. Price: £24,698, £752 less than this car. Dealer: Arnold Clark Chertsey Motorstore / Geely in Chertsey. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-1e208b8bf8b4
• 2021 Mercedes-Benz GLB AMG Line Premium Plus, 1.3 petrol SUV, white. Mileage: 33,100 miles. Price: £24,490, £960 less than this car. Dealer: S James Prestige in Essendine. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-3052f26bc530
• 2021 Mercedes-Benz GLB AMG Line Premium Plus, 1.3 petrol SUV, white. Mileage: 34,626 miles. Price: £23,499, £1,951 less than this car. Dealer: Prestige Motor Trader in Croydon. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-7481582e1d18

• The nearest: 2021 Mercedes-Benz GLB AMG Line Premium Plus, 1.3 petrol SUV, grey, 7 miles from this car. Mileage: 78,200 miles. Price: £20,999, £4,451 less than this car. Dealer: Sapphire Motors in London. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-b05398cd380b