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: 55,800 miles
• Fuel: Diesel
• Body: SUV, 5 doors
• Engine: 2.0 litres
• Gearbox: Automatic
• Colour: White
• CO2: 155 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz GLB AMG Line Premium is advertised with 55,800 miles, approximately 8,400 above the typical mileage for its age. Its asking price of £22,699 is £438 above the AskCar estimate of £22,261. The AskCar estimate uses UK dealer asking prices, including 841 Mercedes-Benz GLB adverts, and accounts for the car’s age, mileage and specification. This car was first seen in our listings data 21 days ago. Our latest MOT record expired on 22 October 2026. Check the current position with the dealer. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Lookers Mercedes-Benz of Maidstone, based in Maidstone. 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: £438 (1%) over the AskCar estimate of £22,261.

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 2021 Mercedes-Benz GLB with the 2.0 diesel engine is typically advertised at £22,800: the median of the 27 for sale on AskCar, as of 7 November 2026.

Time on sale

This 2021 Mercedes-Benz GLB has been on sale for at least 21 days.

Price history

AskCar first saw this advert on 17 October 2026 at £22,499. Its asking price is now £22,699, £200 more.

Price changes recorded:

• 17 October 2026: £22,499
• 18 October 2026: £22,699
• 24 October 2026: £22,899
• 28 October 2026: £22,799
• 2 November 2026: £22,699
• 4 November 2026: £22,499
• 6 November 2026: £22,699

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: the latest record we hold ran out on 22 October 2026; ask the dealer for the current MOT.

It failed its MOT on 22 October 2025 (nearside front tyre has a cut in excess of the requirements deep enough to reach the ply or cords chalked) and passed 1 day later, on 23 October 2025.

There were no advisories at the latest test.

Mileage at that test: 44,457 miles, which matches the advertised 55,800 miles.

Advertised mileage is about 8,400 miles higher 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 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, black. Mileage: 53,211 miles. Price: £23,995, £1,296 more than this car. Dealer: Agnew Group Mercedes-Benz Of Portadown in Portadown. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-78e245e60875
• 2021 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, white. Mileage: 50,486 miles. Price: £21,790, £909 less than this car. Dealer: Vantage Toyota York in York. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-d4b064e9ae77
• 2021 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, black. Mileage: 50,000 miles. Price: £22,849, £150 more than this car. Dealer: A1 Ortos in Oldham. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-1586cce7c3af

• The nearest: 2021 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, blue, 21 miles from this car. Mileage: 41,000 miles. Price: £23,590, £891 more than this car. Dealer: Stratstone Mercedes-Benz of Lakeside in Chafford Hundred and West Thurrock. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-2836aac6f6f1