2021 Mercedes-Benz GLB AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line Premium
• Version: AMG Line Premium Auto Euro 6 5dr
• Year: 2021
• Mileage: 64,540 miles
• Fuel: Diesel
• Body: SUV, 5 doors
• Gearbox: Automatic
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 64,540 miles, this 2021 Mercedes-Benz GLB AMG Line Premium has covered about 17,700 more miles than other 2021 Mercedes-Benz GLB cars. Its asking price of £19,886 is £1,674 below the AskCar estimate of £21,560. The AskCar estimate uses UK dealer asking prices, including 822 Mercedes-Benz GLB adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 37 days ago. Its asking price has since fallen by £1,489. The seller is Heritage Automotive Gloucester, based in Gloucester. 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: £1,674 (7%) under the AskCar estimate of £21,560.

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.

Time on sale

This 2021 Mercedes-Benz GLB has been on sale for at least 37 days.

Price history

AskCar first saw this advert on 2 October 2026 at £21,375. Its asking price is now £19,886, £1,489 less. The latest price cut was seen on 6 November 2026.

Price changes recorded:

• 2 October 2026: £21,375
• 18 October 2026: £20,464
• 24 October 2026: £20,338
• 6 November 2026: £19,886

Mileage and MOT

Advertised mileage is about 17,700 miles higher than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.