2021 Mercedes-Benz B Class

Overview

• Make: Mercedes-Benz
• Model: B Class
• Version: 5dr
• Year: 2021
• Mileage: 50,537 miles
• Body: Hatchback, 5 doors, 5 seats
• Colour: Blue

About this car

This 2021 Mercedes-Benz B Class is advertised with 50,537 miles, approximately 14,500 above the typical mileage for its age. The AskCar estimate for this car is £14,657. It is priced at £35,995, which is £21,338 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 763 Mercedes-Benz B Class cars across different ages and specifications. We first recorded this advert 128 days ago, and its asking price has since fallen by £4,000. Our records show an MOT expiry date of 19 August 2026, which has passed. Ask the dealer for an update. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Gateway Cars Carlisle, based in Carlisle. 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

Above the going rate: £21,338 (145%) over the AskCar estimate of £14,657.

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 763 priced Mercedes-Benz B Class adverts across different ages and specifications, as of 7 November 2026.

Time on sale

This 2021 Mercedes-Benz B Class has been on sale for at least 128 days.

Price history

AskCar first saw this advert on 2 July 2026 at £39,995. Its asking price is now £35,995, £4,000 less. The latest price cut was seen on 4 October 2026.

Price changes recorded:

• 2 July 2026: £39,995
• 3 September 2026: £38,995
• 5 September 2026: £37,995
• 7 September 2026: £36,995
• 23 September 2026: £36,450
• 4 October 2026: £35,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: the latest record we hold ran out on 19 August 2026; ask the dealer for the current MOT.

It has had 2 MOTs. The latest, on 20 August 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 17,509 miles, which matches the advertised 50,537 miles.

Advertised mileage is about 14,500 miles higher than the median mileage of a 2021 Mercedes-Benz B Class on AskCar.