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: 51,813 miles
• Fuel: Diesel
• Body: SUV, 5 doors
• Engine: 2.0 litres
• Gearbox: Automatic
• Colour: Grey
• CO2: 164 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2020 Mercedes-Benz GLB AMG Line Premium has covered 51,813 miles. The dealer is asking £21,200, which is £127 below the AskCar estimate of £21,327. To work out the AskCar estimate, we analyse UK dealer adverts for 841 Mercedes-Benz GLB cars across different ages and specifications. We first saw this car advertised 15 days ago. Its asking price has since fallen by £6,000. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Marshall Nissan Dartford, based in Dartford. 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: £127 (under 1%) under the AskCar estimate of £21,327.

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 15 days.

Price history

AskCar first saw this advert on 23 October 2026 at £27,200. Its asking price is now £21,200, £6,000 less. The latest price cut was seen on 6 November 2026.

Price changes recorded:

• 23 October 2026: £27,200
• 28 October 2026: £27,100
• 30 October 2026: £26,900
• 6 November 2026: £21,200

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 15 September 2027.

It has had 4 MOTs. The latest, on 18 August 2026, passed.

Advisories at the latest test: nearside front tyre worn close to legal limit/worn on edge; offside front tyre worn close to legal limit/worn on edge.

Mileage at that test: 51,450 miles, which matches the advertised 51,813 miles.

Advertised mileage is about 500 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, white. Mileage: 51,780 miles. Price: £21,699, £499 more than this car. Dealer: Lookers Mercedes-Benz of Stoke in Stoke-on-Trent. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2020-47d24d5b520d
• 2020 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, white. Mileage: 51,637 miles. Price: £20,500, £700 less than this car. Dealer: Marshall OMODA & JAECOO Lincoln in Lincoln. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2020-cf9a65566b0f
• 2020 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, black. Mileage: 51,341 miles. Price: £20,995, £205 less than this car. Dealer: NottinghamCar.com in Nottingham. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2020-611ba76014e1

• The nearest: 2020 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, grey, 14 miles from this car. Mileage: 48,893 miles. Price: £19,900, £1,300 less than this car. Dealer: Big Motoring World Blue Bell Hill in Blue Bell Hill. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2020-346ad91c1f04