2021 Mercedes-Benz GLB 1.3 GLB200 AMG Line Premium Plus

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line Premium Plus
• Version: 1.3 GLB200 AMG Line Premium Plus DCT FWD Euro 6 (s/s) 5dr 2) 7G (161 bhp)
• Year: 2021
• Mileage: 33,100 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 161 bhp
• Gearbox: Automatic (DCT)
• Drive: Front-wheel drive
• Colour: White
• CO2: 164 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz GLB AMG Line Premium Plus has covered 33,100 miles, around 13,800 fewer miles than is typical for its age. The dealer is asking £24,490, which is £510 below the AskCar estimate of £25,000. 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 46 days ago, and its asking price has since fallen by £500. Our records show an MOT expiry date of 30 October 2026, which has passed. Ask the dealer for an update. The government's MOT record matches its advertised mileage. It is advertised by S James Prestige in Stamford. 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: £510 (2%) under the AskCar estimate of £25,000.

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 1.3 petrol engine is typically advertised at £21,000: the median of the 51 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2021 Mercedes-Benz GLB has been on sale for at least 46 days.

Price history

AskCar first saw this advert on 23 September 2026 at £24,990. Its asking price is now £24,490, £500 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 23 September 2026: £24,990
• 29 October 2026: £24,490

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: the latest record we hold ran out on 30 October 2026; ask the dealer for the current MOT.

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

There were no advisories at the latest test.

Mileage at that test: 29,829 miles, which matches the advertised 33,100 miles.

Advertised mileage is about 13,800 miles lower than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

Similar cars

7 other 2021 Mercedes-Benz GLB AMG Line Premium Plus 1.3 petrol automatic SUVs are for sale at UK dealers, from £19,994 to £25,450, as of 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line Premium Plus, 1.3 petrol SUV, white. Mileage: 34,626 miles. Price: £23,499, £991 less than this car. Dealer: Prestige Motor Trader in Croydon. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-7481582e1d18
• 2021 Mercedes-Benz GLB AMG Line Premium Plus, 1.3 petrol SUV, white. Mileage: 43,100 miles. Price: £22,990, £1,500 less than this car. Dealer: Lkc Motors in Worksop. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-a16fa2adbed2
• 2021 Mercedes-Benz GLB AMG Line Premium Plus, 1.3 petrol SUV, blue. Mileage: 23,000 miles. Price: £25,450, £960 more than this car. Dealer: Jamjar Cars in St Albans. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-7696975be873