2020 Mercedes-Benz GLB 2.0 AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line Premium
• Version: 2.0 AMG Line Premium Auto Euro 6 5dr
• Year: 2020
• Mileage: 55,555 miles
• Fuel: Diesel
• Body: SUV, 5 doors
• Engine: 2.0 litres
• Gearbox: Automatic
• Colour: Blue
• CO2: 156 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2020 Mercedes-Benz GLB AMG Line Premium is advertised with 55,555 miles, approximately 4,200 above the typical mileage for its age. The AskCar estimate for this car is £20,936. It is priced at £22,500, which is £1,564 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. We first saw this car advertised 42 days ago. Its asking price has since fallen by £750. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Group Mercedes-Benz of Watford, based in Watford. 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: £1,564 (7%) over the AskCar estimate of £20,936.

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 2020 Mercedes-Benz GLB with the 2.0 diesel engine is typically advertised at £21,000: the median of the 44 for sale on AskCar, as of 7 November 2026.

Time on sale

This 2020 Mercedes-Benz GLB has been on sale for at least 42 days.

Price history

AskCar first saw this advert on 26 September 2026 at £23,250. Its asking price is now £22,500, £750 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 26 September 2026: £23,250
• 20 October 2026: £22,950
• 3 November 2026: £22,500

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 23 July 2027.

It has had 4 MOTs. The latest, on 30 June 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 53,429 miles, which matches the advertised 55,555 miles.

Advertised mileage is about 4,200 miles higher than the median mileage of a 2020 Mercedes-Benz GLB on AskCar.

Similar cars

29 other 2020 Mercedes-Benz GLB AMG Line Premium 2.0 diesel automatic SUVs are for sale at UK dealers, from £16,000 to £24,995, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2020 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, grey. Mileage: 55,506 miles. Price: £19,929, £2,571 less than this car. Dealer: Stratstone Mercedes-Benz of Wakefield in Wakefield. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2020-e1e82233bf86
• 2020 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, black. Mileage: 53,695 miles. Price: £21,899, £601 less than this car. Dealer: Lookers Mercedes-Benz of Maidstone in Maidstone. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2020-d4cd7ed39948
• 2020 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, grey. Mileage: 51,813 miles. Price: £21,200, £1,300 less than this car. Dealer: Marshall Nissan Dartford in Dartford. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2020-64204af2b95b

• The nearest: 2020 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, black, 10 miles from this car. Mileage: 50,400 miles. Price: £19,050, £3,450 less than this car. Dealer: Car Planet Barnet in Barnet. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2020-a16ff6a747c0