2021 Mercedes-Benz GLB 2.0 GLB200d AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line Premium
• Version: 2.0 GLB200d AMG Line Premium DCT 4WD Euro 6 (s/s) 5dr 8G (148 bhp)
• Year: 2021
• Mileage: 41,035 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 7 seats
• Engine: 2.0 litres, 148 bhp
• Gearbox: Automatic (DCT)
• Drive: Four-wheel drive
• Colour: Black
• CO2: 154 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 41,035 miles, this 2021 Mercedes-Benz GLB AMG Line Premium has covered about 6,400 fewer miles than other 2021 Mercedes-Benz GLB cars. Its asking price of £22,950 is £747 below the AskCar estimate of £23,697. The AskCar estimate uses 841 UK dealer adverts for the Mercedes-Benz GLB, with adjustments for age, mileage, trim, engine and other specifications. We have tracked this advert for 25 days. The government's MOT record matches its advertised mileage. It is advertised by NSA Motor Vehicles in Milton Keynes. 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: £747 (3%) under the AskCar estimate of £23,697.

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 25 days.

Price history

AskCar first saw this advert on 13 October 2026 at £22,950. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 26 January 2027.

It has had 3 MOTs. The latest, on 31 December 2025, passed.

Advisories at the latest test: front brake disc worn, pitted or scored, but not seriously weakened both sides.

Mileage at that test: 37,327 miles, which matches the advertised 41,035 miles.

Advertised mileage is about 6,400 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 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, blue. Mileage: 41,000 miles. Price: £23,590, £640 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
• 2021 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, grey. Mileage: 41,405 miles. Price: £21,500, £1,450 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, £845 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, black, 52 miles from this car. Mileage: 68,280 miles. Price: £21,200, £1,750 less than this car. Dealer: Sytner Select Swindon in Swindon. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-f069fd0d6254