2021 Mercedes-Benz GLB 1.3 GLB200 AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line Premium
• Version: 1.3 GLB200 AMG Line Premium DCT FWD Euro 6 (s/s) 5dr 2) 7G (161 bhp)
• Year: 2021
• Mileage: 38,019 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 161 bhp
• Gearbox: Automatic (DCT)
• Drive: Front-wheel drive
• Colour: Red
• CO2: 163 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz GLB AMG Line Premium is advertised with 38,019 miles, approximately 8,600 below the typical mileage for its age. Priced at £19,495, it is advertised £2,625 below the AskCar estimate of £22,120. The AskCar estimate uses UK dealer asking prices, including 863 Mercedes-Benz GLB adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 78 days ago. Its asking price has since fallen by £3,325. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Swansway Garages Swansway Honda Stockport, based in Stockport. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Good value: £2,625 (11%) under the AskCar estimate of £22,120.

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 863 priced Mercedes-Benz GLB adverts across different ages and specifications, as of 6 November 2026.

A 2021 Mercedes-Benz GLB with the 1.3 petrol engine is typically advertised at £21,000: the median of the 53 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2021 Mercedes-Benz GLB has been on sale for at least 78 days.

Price history

AskCar first saw this advert on 20 August 2026 at £22,820. Its asking price is now £19,495, £3,325 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 20 August 2026: £22,820
• 27 August 2026: £22,575
• 9 September 2026: £22,345
• 10 September 2026: £22,495
• 11 September 2026: £21,995
• 18 September 2026: £21,945
• 25 September 2026: £21,745
• 8 October 2026: £21,645
• 13 October 2026: £21,495
• 20 October 2026: £20,995
• 24 October 2026: £20,495
• 28 October 2026: £19,995
• 3 November 2026: £19,495

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 12 August 2027.

It failed its MOT on 13 August 2026 (horn not working; nearside front road wheel fixing missing) and passed later the same day.

There were no advisories at the latest test.

Mileage at that test: 36,826 miles, which matches the advertised 38,019 miles.

Advertised mileage is about 8,600 miles lower than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

Similar cars

17 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 6 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, blue. Mileage: 38,116 miles. Price: £22,399, £2,904 more than this car. Dealer: cinch in Bolton. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-41986bfc5ed3
• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, red. Mileage: 40,846 miles. Price: £21,426, £1,931 more than this car. Dealer: Vertu Ford Redditch in Redditch. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-1a15c08b57dd
• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, grey. Mileage: 41,340 miles. Price: £23,498, £4,003 more than this car. Dealer: Arnold Clark Mercedes-Benz of Grangemouth in Grangemouth. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-0856e965d794

• The nearest: 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, grey, 5 miles from this car. Mileage: 51,400 miles. Price: £19,995, £500 more than this car. Dealer: CC Cars in Dukinfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-91e74fe85a2a