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: 41,640 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

This 2021 Mercedes-Benz G Class AMG has covered 41,640 miles, around 5,600 more miles than is typical for its age. Priced at £134,995, it is advertised £6,175 below the AskCar estimate of £141,170. The AskCar estimate uses 408 UK dealer adverts for the Mercedes-Benz G Class, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this advert 1 day ago, and its asking price has since fallen by £5,000. It is advertised by My Next Car in Sandy. 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: £6,175 (4%) under the AskCar estimate of £141,170.

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

Time on sale

AskCar first saw this 2021 Mercedes-Benz G Class advertised 1 day ago.

Price history

AskCar first saw this advert on 6 November 2026 at £139,995. Its asking price is now £134,995, £5,000 less. The latest price cut was seen on 7 November 2026.

Price changes recorded:

• 6 November 2026: £139,995
• 7 November 2026: £134,995

Mileage and MOT

Advertised mileage is about 5,600 miles higher 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 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 43,950 miles. Price: £127,475, £7,520 less than this car. Dealer: Portland Of Bawtry in Doncaster. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-a453556f4cc1
• 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 36,000 miles. Price: £129,995, £5,000 less than this car. Dealer: First Autos in Watford. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-ef618097de07
• 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 36,000 miles. Price: £139,850, £4,855 more than this car. Dealer: Autobahn Direct in Wembley. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-e006ff5069a1

• The nearest: 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black, under a mile from this car. Mileage: 25,000 miles. Price: £169,995, £35,000 more than this car. Dealer: My Next Car in Sandy. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-5d23a6ab20cd