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: 42,500 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 161 bhp
• Gearbox: Automatic
• Drive: Front-wheel drive
• Colour: Blue
• CO2: 163 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz GLB AMG Line Premium is advertised with 42,500 miles, approximately 4,400 below the typical mileage for its age. The AskCar estimate for this car is £21,598. It is priced at £21,995, which is £397 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 822 Mercedes-Benz GLB cars across different ages and specifications. Since we first spotted the advert 33 days ago, the asking price has dropped by £1,000. Its advertised mileage matches the government's MOT record. You can find this car at Evo Motor Group in Radlett. 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: £397 (1%) over the AskCar estimate of £21,598.

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 33 days.

Price history

AskCar first saw this advert on 6 October 2026 at £22,995. Its asking price is now £21,995, £1,000 less. The latest price cut was seen on 14 October 2026.

Price changes recorded:

• 6 October 2026: £22,995
• 13 October 2026: £22,395
• 14 October 2026: £21,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 24 September 2027.

It failed its MOT on 25 September 2026 (nearside front tyre tread depth below requirements of 1.6mm) and passed later the same day.

Advisories at the latest test: nearside rear tyre slightly damaged/cracking or perishing; offside rear tyre slightly damaged/cracking or perishing; nearside front brake disc worn, pitted or scored, but not seriously weakened; and 3 more.

Mileage at that test: 41,911 miles, which matches the advertised 42,500 miles.

Advertised mileage is about 4,400 miles lower than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

Similar cars

15 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 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, grey. Mileage: 41,340 miles. Price: £23,498, £1,503 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
• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, blue. Mileage: 46,868 miles. Price: £23,000, £1,005 more than this car. Dealer: Sytner Group Mercedes-Benz of West London in London. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-57a225c794d9
• 2021 Mercedes-Benz GLB AMG Line Premium, 1.3 petrol SUV, blue. Mileage: 38,116 miles. Price: £22,079, £84 more than this car. Dealer: cinch in Bolton. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-41986bfc5ed3