2021 Mercedes-Benz GLB 1.3 GLB200 AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line Premium
• Version: 1.3 AMG Line Premium Auto FWD Euro 6 5dr (161 bhp)
• Year: 2021
• Mileage: 71,049 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 161 bhp
• Gearbox: Automatic
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 163 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 71,049 miles, this 2021 Mercedes-Benz GLB AMG Line Premium has covered about 23,700 more miles than other 2021 Mercedes-Benz GLB cars. The AskCar estimate for this car is £18,345. It is priced at £18,480, which is £135 above that estimate. The AskCar estimate uses UK dealer asking prices, including 841 Mercedes-Benz GLB adverts, and accounts for the car’s age, mileage and specification. Since we first spotted the advert 95 days ago, the asking price has dropped by £8,520. The recorded MOT expired on 16 October 2026, so ask the dealer whether it has been renewed. We checked its advertised mileage against the government's MOT record, and they match. The seller is Marshall Volkswagen Harlow, based in Harlow. 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: £135 (under 1%) over the AskCar estimate of £18,345.

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 95 days.

Price history

AskCar first saw this advert on 4 August 2026 at £27,000. Its asking price is now £18,480, £8,520 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 4 August 2026: £27,000
• 22 August 2026: £20,300
• 4 September 2026: £20,000
• 18 September 2026: £19,500
• 23 September 2026: £19,700
• 3 October 2026: £19,125
• 16 October 2026: £18,600
• 28 October 2026: £18,480

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 16 October 2026; ask the dealer for the current MOT.

It has had one MOT, on 17 October 2025, and passed.

Advisories at the latest test: windscreen damaged but not adversely affecting driver's view.

Mileage at that test: 57,080 miles, which matches the advertised 71,049 miles.

Advertised mileage is about 23,700 miles higher than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

Similar cars

16 other 2021 Mercedes-Benz GLB AMG Line Premium 1.3 petrol automatic SUVs are for sale at UK dealers, from £18,750 to £23,498, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, grey. Mileage: 60,500 miles. Price: £19,995, £1,515 more than this car. Dealer: Amanah Prestige in Barking and Dagenham. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-80e76420ebcf
• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, red. Mileage: 60,418 miles. Price: £20,998, £2,518 more than this car. Dealer: Arnold Clark Greenock East Hamilton Street Lepas in Greenock. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-fa8f4dd361e5
• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, blue. Mileage: 59,000 miles. Price: £21,499, £3,019 more than this car. Dealer: AB Car Sales in Gunnislake. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-401d077a3ac7