2021 Mercedes-Benz G Class 4.0 G63 V8 BiTurbo AMG

Overview

• Make: Mercedes-Benz
• Model: G Class
• Trim: AMG
• Version: 4.0 G63 V8 BiTurbo AMG Auto 4WD Euro 6 (s/s) 5dr SpdS+9GT (577 bhp)
• Year: 2021
• Mileage: 30,000 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 5 seats
• Engine: 4.0 litres, 577 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 30,000 miles on the clock, this 2021 Mercedes-Benz G Class AMG has done roughly 6,000 fewer miles than a typical 2021 Mercedes-Benz G Class. The dealer is asking £143,995, which is £6,540 below the AskCar estimate of £150,535. To work out the AskCar estimate, we analyse UK dealer adverts for 413 Mercedes-Benz G Class cars across different ages and specifications. Since we first spotted the advert 19 days ago, the asking price has dropped by £1,900. It is for sale at Sedgley Group in Manchester. 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: £6,540 (4%) under the AskCar estimate of £150,535.

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

A 2021 Mercedes-Benz G Class with the 4.0 petrol engine is typically advertised at £136,200: the median of the 30 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2021 Mercedes-Benz G Class has been on sale for at least 19 days.

Price history

AskCar first saw this advert on 20 October 2026 at £145,895. Its asking price is now £143,995, £1,900 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 20 October 2026: £145,895
• 27 October 2026: £144,995
• 29 October 2026: £143,995

Mileage and MOT

Advertised mileage is about 6,000 miles lower than the median mileage of a 2021 Mercedes-Benz G Class on AskCar.

Similar cars

19 other 2021 Mercedes-Benz G Class AMG 4.0 petrol automatic SUVs are for sale at UK dealers, from £83,991 to £179,995, as of 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, grey. Mileage: 30,000 miles. Price: £133,995, £10,000 less than this car. Dealer: Andreas Prestige in Hillingdon. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-57de5cb88b13
• 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 34,101 miles. Price: £137,995, £6,000 less than this car. Dealer: Aim Autos in Tockwith. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-947861f33125
• 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 25,000 miles. Price: £169,995, £26,000 more than this car. Dealer: My Next Car in Sandy. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-5d23a6ab20cd

• The nearest: 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, silver, 7 miles from this car. Mileage: 68,200 miles. Price: £114,995, £29,000 less than this car. Dealer: Motorvana in Manchester. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-958eb232ea89