2021 Mercedes-Benz GLB 1.3 GLB200 AMG Line

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line
• Version: 1.3 AMG Line Auto FWD Euro 6 5dr (160 bhp)
• Year: 2021
• Mileage: 30,987 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 160 bhp
• Gearbox: Automatic
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 163 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz GLB AMG Line has covered 30,987 miles, around 16,400 fewer miles than is typical for its age. The dealer is asking £21,999, which is £350 above the AskCar estimate of £21,649. To work out the AskCar estimate, we analyse UK dealer adverts for 835 Mercedes-Benz GLB cars across different ages and specifications. This car was first seen in our listings data 10 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is advertised by Gates Of Woodford in Woodford Green. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 10 November 2026.

How we estimate prices and check cars

Price

Fair price: £350 (1%) over the AskCar estimate of £21,649.

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 835 priced Mercedes-Benz GLB adverts across different ages and specifications, as of 10 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 10 November 2026.

Time on sale

This 2021 Mercedes-Benz GLB has been on sale for at least 10 days.

Price history

AskCar first saw this advert on 31 October 2026 at £21,999. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 10 November 2026: valid until 11 June 2027.

It has had 4 MOTs. The latest, on 12 June 2026, passed.

Advisories at the latest test: front brake pad(s) wearing thin.

Mileage at that test: 24,894 miles, which matches the advertised 30,987 miles.

Advertised mileage is about 16,400 miles lower than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

Similar cars

27 other 2021 Mercedes-Benz GLB AMG Line 1.3 petrol automatic SUVs are for sale at UK dealers, from £15,795 to £22,595, as of 10 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, grey. Mileage: 30,623 miles. Price: £22,000, the same price as this car. Dealer: ESP Cars in Long Eaton. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-4b800fa52a07
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, grey. Mileage: 29,550 miles. Price: £20,990, £1,009 less than this car. Dealer: Motor Gurus in Sheffield. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-76fdcaf62d3b
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, silver. Mileage: 29,302 miles. Price: £20,990, £1,009 less than this car. Dealer: Motor 4 U in Flimwell. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-a0e884189239

• The nearest: 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, black, 11 miles from this car. Mileage: 55,362 miles. Price: £18,900, £3,099 less than this car. Dealer: Lmc Cars in Upminster. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-041cc4426a27