2021 Mercedes-Benz GLB 1.3 GLB200 AMG Line

Overview

• Make: Mercedes-Benz
• Model: GLB
• Trim: AMG Line
• Version: 1.3 GLB200 AMG Line DCT FWD Euro 6 (s/s) 5dr 7G (161 bhp)
• Year: 2021
• Mileage: 52,794 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 7 seats
• Engine: 1.3 litres, 161 bhp
• Gearbox: Automatic (DCT)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 163 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 52,794 miles on the clock, this 2021 Mercedes-Benz GLB AMG Line has done roughly 5,400 more miles than a typical 2021 Mercedes-Benz GLB. The AskCar estimate for this car is £20,095. It is priced at £18,990, which is £1,105 below that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 841 Mercedes-Benz GLB cars across different ages and specifications. We first recorded this advert 17 days ago, and its asking price has since fallen by £5,200. Its advertised mileage matches the government's MOT record. The seller is Big Motoring World Blue Bell Hill, based in Chatham. 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: £1,105 (5%) under the AskCar estimate of £20,095.

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 17 days.

Price history

AskCar first saw this advert on 21 October 2026 at £24,190. Its asking price is now £18,990, £5,200 less. The latest price cut was seen on 7 November 2026.

Price changes recorded:

• 21 October 2026: £24,190
• 22 October 2026: £19,250
• 24 October 2026: £19,210
• 25 October 2026: £19,170
• 27 October 2026: £19,160
• 28 October 2026: £19,140
• 31 October 2026: £19,080
• 3 November 2026: £19,050
• 4 November 2026: £19,040
• 5 November 2026: £19,020
• 6 November 2026: £19,000
• 7 November 2026: £18,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 2 August 2027.

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

Advisories at the latest test: front registration plate deteriorated but not likely to be misread; offside front tyre slightly damaged/cracking or perishing; offside front tyre worn close to legal limit/worn on edge; and 1 more.

Mileage at that test: 51,538 miles, which matches the advertised 52,794 miles.

Advertised mileage is about 5,400 miles higher than the median mileage of a 2021 Mercedes-Benz GLB on AskCar.

Similar cars

25 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 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, red. Mileage: 48,918 miles. Price: £19,995, £1,005 more than this car. Dealer: Georgesons Car Sales in Liverpool. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-4177475a136e
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, white. Mileage: 46,841 miles. Price: £18,990, the same price as this car. Dealer: Endeavour Omoda & Jaecoo Watford in Watford. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-ff9163a6be21
• 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, blue. Mileage: 46,465 miles. Price: £19,097, £107 more than this car. Dealer: Luks Autohaus in Leicester. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-5bf90beb8cb8

• The nearest: 2021 Mercedes-Benz GLB AMG Line, 1.3 petrol SUV, grey, 15 miles from this car. Mileage: 65,560 miles. Price: £18,495, £495 less than this car. Dealer: Motoroo in Basildon. AskCar page: https://askcar.co.uk/car/mercedes-benz-glb-2021-0171ad620b6e