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: 55,506 miles
• Fuel: Diesel
• Body: SUV, 5 doors
• Engine: 2.0 litres
• Gearbox: Automatic
• Colour: Grey
• CO2: 155 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 55,506 miles on the clock, this 2020 Mercedes-Benz GLB AMG Line Premium has done roughly 4,200 more miles than a typical 2020 Mercedes-Benz GLB. The dealer is asking £19,929, which is £1,012 below the AskCar estimate of £20,941. To work out the AskCar estimate, we analyse UK dealer adverts for 841 Mercedes-Benz GLB cars across different ages and specifications. The asking price is now £561 lower than when we first recorded the advert 11 days ago. We checked its advertised mileage against the government's MOT record, and they match. The seller is Stratstone Mercedes-Benz of Wakefield, based in Wakefield. 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: £1,012 (4%) under the AskCar estimate of £20,941.

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 11 days.

Price history

AskCar first saw this advert on 27 October 2026 at £20,490. Its asking price is now £19,929, £561 less. The latest price cut was seen on 1 November 2026.

Price changes recorded:

• 27 October 2026: £20,490
• 1 November 2026: £19,929

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 30 July 2027.

It has had 5 MOTs. The latest, on 20 July 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 52,697 miles, which matches the advertised 55,506 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, blue. Mileage: 55,555 miles. Price: £22,500, £2,571 more than this car. Dealer: Sytner Group Mercedes-Benz of Watford in Watford. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2020-b6d18aa575e4
• 2020 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, black. Mileage: 53,695 miles. Price: £21,899, £1,970 more 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, £1,271 more 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, white, 26 miles from this car. Mileage: 68,500 miles. Price: £18,699, £1,230 less than this car. Dealer: Prestige Car Supermarket in York. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2020-128a4ccd34d4