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: 39,900 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 161 bhp
• Gearbox: Automatic (DCT)
• Drive: Front-wheel drive
• Colour: White
• CO2: 163 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 39,900 miles, this 2021 Mercedes-Benz GLB AMG Line has covered about 7,000 fewer miles than other 2021 Mercedes-Benz GLB cars. The AskCar estimate for this car is £21,425. It is priced at £20,495, which is £930 below that estimate. The AskCar estimate draws on 822 Mercedes-Benz GLB adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 67 days ago. Its asking price has since fallen by £1,000. We checked its advertised mileage against the government's MOT record, and they match. It is advertised by Georgesons Car Sales in Liverpool. 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: £930 (4%) under the AskCar estimate of £21,425.

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 67 days.

Price history

AskCar first saw this advert on 2 September 2026 at £21,495. Its asking price is now £20,495, £1,000 less. The latest price cut was seen on 17 October 2026.

Price changes recorded:

• 2 September 2026: £21,495
• 17 October 2026: £20,495

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 5 March 2027.

It has had 3 MOTs. The latest, on 18 February 2026, passed.

Advisories at the latest test: front brake disc worn, pitted or scored, but not seriously weakened; rear brake disc worn, but not excessively; rear brake pad(s) wearing thin; and 2 more.

Mileage at that test: 35,275 miles, which matches the advertised 39,900 miles.

Advertised mileage is about 7,000 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 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, blue. Mileage: 39,797 miles. Price: £20,698, £203 more than this car. Dealer: Stratstone Mercedes-Benz of Colchester in Colchester. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-37bb8ceb501d
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, blue. Mileage: 36,960 miles. Price: £20,199, £296 less than this car. Dealer: Fords Of Winsford Car Supermarket in Winsford. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-0cf243a7fa08
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, silver. Mileage: 34,750 miles. Price: £21,999, £1,504 more than this car. Dealer: Team Virtus in Pulborough. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-2bb79b58b21e

• The nearest: 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, red, under a mile from this car. Mileage: 48,918 miles. Price: £19,995, £500 less than this car. Dealer: Georgesons Car Sales in Liverpool. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-4177475a136e