2021 Mercedes-Benz G Class 4.0 AMG

Overview

• Make: Mercedes-Benz
• Model: G Class
• Trim: AMG
• Version: 4.0 G 63 AMG 9G-Tronic 4WD Euro 6 5dr Speedshift Plus (576 bhp)
• Year: 2021
• Mileage: 71,413 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 5 seats
• Engine: 4.0 litres, 576 bhp
• Gearbox: Automatic (9G-Tronic)
• Drive: Four-wheel drive
• Colour: Black
• CO2: 369 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz G Class AMG is advertised with 71,413 miles, approximately 35,400 above the typical mileage for its age. Its asking price of £121,997 is £9,755 above the AskCar estimate of £112,242. The AskCar estimate uses 413 UK dealer adverts for the Mercedes-Benz G Class, with adjustments for age, mileage, trim, engine and other specifications. We have tracked this advert for 4 days. The government's MOT record matches its advertised mileage. 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

Above the going rate: £9,755 (8%) over the AskCar estimate of £112,242.

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

AskCar first saw this 2021 Mercedes-Benz G Class advertised 4 days ago.

Price history

AskCar first saw this advert on 4 November 2026 at £121,997. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 11 December 2026.

It has had 2 MOTs. The latest, on 12 December 2025, passed.

Advisories at the latest test: front brake disc worn, pitted or scored, but not seriously weakened; rear brake disc worn, pitted or scored, but not seriously weakened; front brake pad(s) wearing thin; and 6 more.

Mileage at that test: 67,866 miles, which matches the advertised 71,413 miles.

Advertised mileage is about 35,400 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 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 70,000 miles. Price: £124,995, £2,998 more than this car. Dealer: The Motoring Team in Chesham. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-d21e7bb5c073
• 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, silver. Mileage: 68,200 miles. Price: £114,995, £7,002 less than this car. Dealer: Motorvana in Manchester. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-958eb232ea89
• 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 68,000 miles. Price: £121,995, the same price as this car. Dealer: CarPlex in Hailsham. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-af0eb0d323e5