2021 Mercedes-Benz GLB 2.0 AMG Line Premium Plus

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line Premium Plus
• Version: 2.0 AMG Line Premium Plus Auto Euro 6 5dr
• Year: 2021
• Mileage: 45,672 miles
• Fuel: Diesel
• Body: SUV, 5 doors
• Engine: 2.0 litres
• Gearbox: Automatic
• Colour: Red
• CO2: 157 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz GLB AMG Line Premium Plus has covered 45,672 miles. Priced at £22,990, it is advertised £1,113 below the AskCar estimate of £24,103. 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 64 days ago. Its asking price has since fallen by £3,008. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Eastern Western Motor Group Western Mercedes-Benz of Coldstream, based in Coldstream. 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: £1,113 (4%) under the AskCar estimate of £24,103.

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 64 days.

Price history

AskCar first saw this advert on 4 September 2026 at £25,998. Its asking price is now £22,990, £3,008 less. The latest price cut was seen on 7 November 2026.

Price changes recorded:

• 4 September 2026: £25,998
• 27 September 2026: £25,698
• 8 October 2026: £24,998
• 17 October 2026: £24,490
• 28 October 2026: £23,990
• 7 November 2026: £22,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 29 May 2027.

It has had 3 MOTs. The latest, on 7 May 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 43,130 miles, which matches the advertised 45,672 miles.

Advertised mileage is about 1,700 miles lower than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

Similar cars

3 other 2021 Mercedes-Benz GLB AMG Line Premium Plus 2.0 diesel automatic SUVs are for sale at UK dealers, from £19,490 to £24,955, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line Premium Plus, 2.0 diesel SUV, blue. Mileage: 40,273 miles. Price: £24,955, £1,965 more than this car. Dealer: Hippo Approved in Blackburn. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-78fb6ddf41ba
• 2021 Mercedes-Benz GLB AMG Line Premium Plus, 2.0 diesel SUV, grey. Mileage: 35,546 miles. Price: £24,250, £1,260 more than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-e2c1645c8abd
• 2021 Mercedes-Benz GLB AMG Line Premium Plus, 2.0 diesel SUV, black. Mileage: 94,000 miles. Price: £19,490, £3,500 less than this car. Dealer: LVMC in High Ongar. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-5db032f04daf