2021 Mercedes-Benz GLB 1.3 GLB200 AMG Line

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line
• Version: 1.3 AMG Line Auto FWD Euro 6 5dr (160 bhp)
• Year: 2021
• Mileage: 19,431 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 160 bhp
• Gearbox: Automatic
• Drive: Front-wheel drive
• Colour: Silver
• CO2: 163 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz GLB AMG Line is advertised with 19,431 miles, approximately 28,000 below the typical mileage for its age. Its asking price of £21,360 is £1,352 below the AskCar estimate of £22,712. The AskCar estimate draws on 841 Mercedes-Benz GLB adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 96 days ago. Its asking price has since fallen by £2,110. Our latest MOT record expired on 31 October 2026. Check the current position with the dealer. The government's MOT record matches its advertised mileage. You can find this car at Evans Halshaw BYD Birmingham in Erdington. 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: £1,352 (5%) under the AskCar estimate of £22,712.

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

This 2021 Mercedes-Benz GLB has been on sale for at least 96 days.

Price history

AskCar first saw this advert on 3 August 2026 at £23,470. Its asking price is now £21,360, £2,110 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 3 August 2026: £23,470
• 5 August 2026: £23,230
• 11 August 2026: £22,660
• 25 August 2026: £22,360
• 29 September 2026: £22,250
• 7 October 2026: £21,820
• 20 October 2026: £21,420
• 27 October 2026: £21,360

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: the latest record we hold ran out on 31 October 2026; ask the dealer for the current MOT.

It has had 2 MOTs. The latest, on 1 November 2025, passed.

Advisories at the latest test: under-trays fitted obscuring some underside components; headlamp has a product on the light source but not seriously reducing light output.

Mileage at that test: 18,808 miles, which matches the advertised 19,431 miles.

Advertised mileage is about 28,000 miles lower 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, black. Mileage: 27,685 miles. Price: £22,595, £1,235 more than this car. Dealer: Sandown Group Mercedes-Benz of Poole in Poole. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-f504acb20e88
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, white. Mileage: 29,244 miles. Price: £21,217, £143 less than this car. Dealer: Vindis Group Three10 Automotive in St Ives. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-dfba3c11444b
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, silver. Mileage: 29,302 miles. Price: £20,990, £370 less than this car. Dealer: Motor 4 U in Flimwell. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-a0e884189239

• The nearest: 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, grey, 4 miles from this car. Mileage: 101,000 miles. Price: £15,795, £5,565 less than this car. Dealer: Hiline Motors in Birmingham. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-781004d250b5