2021 Mercedes-Benz B Class 1.3 AMG Line Premium Plus

Overview

• Make: Mercedes-Benz
• Model: B Class
• Trim: AMG Line Premium Plus
• Version: 1.3 AMG Line Premium Plus DCT FWD Euro 6 5dr
• Year: 2021
• Mileage: 28,903 miles
• Fuel: Petrol
• Body: MPV, 5 doors, 5 seats
• Engine: 1.3 litres
• Gearbox: Automatic (DCT)
• Drive: Front-wheel drive
• Colour: White
• CO2: 142 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz B Class AMG Line Premium Plus has covered 28,903 miles, around 7,200 fewer miles than is typical for its age. The dealer is asking £18,500, which is £772 above the AskCar estimate of £17,728. To work out the AskCar estimate, we analyse UK dealer adverts for 756 Mercedes-Benz B Class cars across different ages and specifications. We first recorded this advert 49 days ago, and its asking price has since fallen by £1,000. Its advertised mileage matches the government's MOT record. The seller is Sytner Group Mercedes-Benz of Milton Keynes, based in Milton Keynes. 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: £772 (4%) over the AskCar estimate of £17,728.

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 756 priced Mercedes-Benz B Class adverts across different ages and specifications, as of 8 November 2026.

A 2021 Mercedes-Benz B Class with the 1.3 petrol engine is typically advertised at £16,700: the median of the 35 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2021 Mercedes-Benz B Class has been on sale for at least 49 days.

Price history

AskCar first saw this advert on 20 September 2026 at £19,500. Its asking price is now £18,500, £1,000 less. The latest price cut was seen on 31 October 2026.

Price changes recorded:

• 20 September 2026: £19,500
• 1 October 2026: £19,250
• 16 October 2026: £19,000
• 31 October 2026: £18,500

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 14 February 2027.

It has had 4 MOTs. The latest, on 28 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 23,885 miles, which matches the advertised 28,903 miles.

Advertised mileage is about 7,200 miles lower than the median mileage of a 2021 Mercedes-Benz B Class on AskCar.

Similar cars

3 other 2021 Mercedes-Benz B Class AMG Line Premium Plus 1.3 petrol automatic MPVs are for sale at UK dealers, from £16,232 to £18,499, as of 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz B Class AMG Line Premium Plus, 1.3 petrol MPV, white. Mileage: 16,861 miles. Price: £17,990, £510 less than this car. Dealer: Riverside Volvo Doncaster in Doncaster. AskCar page: https://askcar.co.uk/car/mercedes-benz-b-class-2021-3cc58aeb64c3
• 2021 Mercedes-Benz B Class AMG Line Premium Plus, 1.3 petrol MPV, white. Mileage: 42,787 miles. Price: £16,232, £2,268 less than this car. Dealer: Sandicliffe FordStore Leicester in Leicester. AskCar page: https://askcar.co.uk/car/mercedes-benz-b-class-2021-433bdffc9618
• 2021 Mercedes-Benz B Class AMG Line Premium Plus, 1.3 petrol MPV, white. Mileage: 14,352 miles. Price: £18,499, the same price as this car. Dealer: Available Car Supermarket - Sutton-In-Ashfield in Sutton in Ashfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-b-class-2021-31fd3763b45b