2021 Mercedes-Benz GLB 1.3 GLB200 AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line Premium
• Version: 1.3 AMG Line Premium Auto FWD Euro 6 5dr (161 bhp)
• Year: 2021
• Mileage: 20,881 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 161 bhp
• Gearbox: Automatic
• Drive: Front-wheel drive
• Colour: White
• CO2: 163 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz GLB AMG Line Premium is advertised with 20,881 miles, approximately 26,500 below the typical mileage for its age. Priced at £23,190, it is advertised £548 below the AskCar estimate of £23,738. 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 110 days ago. Its asking price has since fallen by £3,800. The government's MOT record matches its advertised mileage. It is advertised by Stratstone Mercedes-Benz of Lakeside in West Thurrock. 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: £548 (2%) under the AskCar estimate of £23,738.

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 1.3 petrol engine is typically advertised at £21,000: the median of the 52 for sale on AskCar, as of 7 November 2026.

Time on sale

This 2021 Mercedes-Benz GLB has been on sale for at least 110 days.

Price history

AskCar first saw this advert on 20 July 2026 at £26,990. Its asking price is now £23,190, £3,800 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 21 July 2026: £26,990
• 28 July 2026: £26,690
• 8 August 2026: £26,650
• 16 August 2026: £25,990
• 27 August 2026: £25,590
• 4 September 2026: £25,250
• 17 September 2026: £25,090
• 29 September 2026: £24,790
• 10 October 2026: £24,390
• 13 October 2026: £24,290
• 27 October 2026: £23,190

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 8 July 2027.

It has had 3 MOTs. The latest, on 25 June 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 20,405 miles, which matches the advertised 20,881 miles.

Advertised mileage is about 26,500 miles lower than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

Similar cars

16 other 2021 Mercedes-Benz GLB AMG Line Premium 1.3 petrol automatic SUVs are for sale at UK dealers, from £18,480 to £23,498, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, grey. Mileage: 24,580 miles. Price: £21,995, £1,195 less than this car. Dealer: Aim Autos in Tockwith. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-2a54e3097462
• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, blue. Mileage: 29,250 miles. Price: £22,495, £695 less than this car. Dealer: Georgesons Car Sales in Liverpool. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-2023651efade
• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, white. Mileage: 10,000 miles. Price: £19,495, £3,695 less than this car. Dealer: National Car Hub in Walsall. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-c2fe1419ea12

• The nearest: 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, grey, 9 miles from this car. Mileage: 60,500 miles. Price: £19,995, £3,195 less than this car. Dealer: Amanah Prestige in Barking and Dagenham. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-80e76420ebcf