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: 60,418 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 161 bhp
• Gearbox: Automatic
• 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 has covered 60,418 miles, around 13,000 more miles than is typical for its age. The dealer is asking £20,998, which is £1,300 above the AskCar estimate of £19,698. To work out the AskCar estimate, we analyse UK dealer adverts for 841 Mercedes-Benz GLB cars across different ages and specifications. The asking price is now £500 lower than when we first recorded the advert 43 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Arnold Clark Greenock East Hamilton Street Lepas, based in Greenock. 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: £1,300 (6%) over the AskCar estimate of £19,698.

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 43 days.

Price history

AskCar first saw this advert on 25 September 2026 at £21,498. Its asking price is now £20,998, £500 less. The latest price cut was seen on 7 October 2026.

Price changes recorded:

• 25 September 2026: £21,498
• 7 October 2026: £20,998

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 29 May 2027.

It has had 3 MOTs. The latest, on 22 May 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 57,888 miles, which matches the advertised 60,418 miles.

Advertised mileage is about 13,000 miles higher 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: 60,500 miles. Price: £19,995, £1,003 less than this car. Dealer: Amanah Prestige in Barking and Dagenham. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-80e76420ebcf
• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, blue. Mileage: 59,000 miles. Price: £21,499, £501 more than this car. Dealer: AB Car Sales in Gunnislake. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-401d077a3ac7
• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, grey. Mileage: 51,400 miles. Price: £19,995, £1,003 less than this car. Dealer: CC Cars in Dukinfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-91e74fe85a2a

• The nearest: 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, grey, 39 miles from this car. Mileage: 41,340 miles. Price: £23,498, £2,500 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