2021 Mercedes-Benz GLB 2.0 GLB220d AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line Premium
• Version: 2.0 GLB220d AMG Line Premium DCT 4WD Euro 6 (s/s) 5dr 8G (5 Seat) (187 bhp)
• Year: 2021
• Mileage: 44,000 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 5 seats
• Engine: 2.0 litres, 187 bhp
• Gearbox: Automatic (DCT)
• Drive: Four-wheel drive
• Colour: Black
• CO2: 161 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz GLB AMG Line Premium has covered 44,000 miles, around 3,400 fewer miles than is typical for its age. Priced at £23,795, it is advertised £251 below the AskCar estimate of £24,046. The AskCar estimate uses 841 UK dealer adverts for the Mercedes-Benz GLB, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this car for sale 163 days ago. Its advertised mileage matches the government's MOT record. The seller is Mercedes-Benz South West Mercedes Benz Of Exeter, based in Exeter. 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: £251 (1%) under the AskCar estimate of £24,046.

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 163 days.

Price history

AskCar first saw this advert on 28 May 2026 at £23,795. 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 25 February 2027.

It has had 3 MOTs. The latest, on 13 February 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 42,767 miles, which matches the advertised 44,000 miles.

Advertised mileage is about 3,400 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, grey. Mileage: 41,405 miles. Price: £21,500, £2,295 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: 41,035 miles. Price: £22,950, £845 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, blue. Mileage: 41,000 miles. Price: £23,590, £205 less 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

• The nearest: 2021 Mercedes-Benz GLB AMG Line Premium, 2.0 diesel SUV, silver, 68 miles from this car. Mileage: 62,500 miles. Price: £20,500, £3,295 less than this car. Dealer: Colin Ludwell Cars in Bristol. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-1ae87933a2f3