2021 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: 2021
• Mileage: 41,000 miles
• Fuel: Diesel
• Body: SUV, 5 doors
• Engine: 2.0 litres
• Gearbox: Automatic
• Colour: Blue
• CO2: 155 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 41,000 miles on the clock, this 2021 Mercedes-Benz GLB AMG Line Premium has done roughly 5,900 fewer miles than a typical 2021 Mercedes-Benz GLB. The dealer is asking £23,590, which is £362 below the AskCar estimate of £23,952. To work out the AskCar estimate, we analyse UK dealer adverts for 822 Mercedes-Benz GLB cars across different ages and specifications. We first recorded this advert 17 days ago, and its asking price has since fallen by £900. The government's MOT record matches its advertised mileage. It is advertised by Stratstone Mercedes-Benz of Lakeside in West Thurrock. 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: £362 (1%) under the AskCar estimate of £23,952.

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 2.0 diesel engine is typically advertised at £23,000: the median of the 27 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2021 Mercedes-Benz GLB has been on sale for at least 17 days.

Price history

AskCar first saw this advert on 22 October 2026 at £24,490. Its asking price is now £23,590, £900 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 22 October 2026: £24,490
• 3 November 2026: £23,590

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 23 September 2027.

It has had 5 MOTs. The latest, on 18 September 2026, passed.

Advisories at the latest test: offside front tyre has a cut but not deep enough to reach the ply or cords; nearside rear tyre slightly damaged/cracking or perishing outer sidewall; offside rear tyre slightly damaged/cracking or perishing.

Mileage at that test: 40,835 miles, which matches the advertised 41,000 miles.

Advertised mileage is about 5,900 miles lower than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

Similar cars

14 other 2021 Mercedes-Benz GLB AMG Line Premium 2.0 diesel automatic SUVs are for sale at UK dealers, from £19,490 to £24,995, as of 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, black. Mileage: 41,035 miles. Price: £22,950, £640 less than this car. Dealer: NSA Motor Vehicles in Milton Keynes. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-11cde202d124
• 2021 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, grey. Mileage: 41,405 miles. Price: £21,500, £2,090 less than this car. Dealer: Motor Village in Stoke-on-Trent. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-74710578b958
• 2021 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, black. Mileage: 44,000 miles. Price: £23,795, £205 more than this car. Dealer: Mercedes-Benz South West Mercedes Benz Of Exeter in Exeter. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-a9c92185bd02

• The nearest: 2021 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, white, 21 miles from this car. Mileage: 55,800 miles. Price: £22,699, £891 less than this car. Dealer: Lookers Mercedes-Benz of Maidstone in Maidstone. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-9274b08ffd64