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: 13,991 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 has covered 13,991 miles. Priced at £83,991, this car is advertised £69,622 below the AskCar estimate of £153,613. This is a large price difference, so check the price and vehicle details with the dealer. To work out the AskCar estimate, we analyse UK dealer adverts for 413 Mercedes-Benz G Class cars across different ages and specifications. It first appeared in our advert records 89 days ago. The last MOT shows 22,285 miles, more than the advert. This is worth checking with the dealer. The latest recorded MOT expires on 1 January 2027. You can find this car at ASM (uk) in Redditch. 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

Far below the going rate: £69,622 (45%) under the AskCar estimate of £153,613. Worth asking the dealer why.

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 89 days.

Price history

AskCar first saw this advert on 11 August 2026 at £83,991. 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 1 January 2027.

It has had 3 MOTs. The latest, on 2 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 22,285 miles. The advert says 13,991 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 22,000 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 £114,995 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: 13,250 miles. Price: £179,995, £96,004 more than this car. Dealer: Yorkshire Motor Group in Barnsley. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-ad34fcbcf602
• 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 12,719 miles. Price: £135,995, £52,004 more than this car. Dealer: MB Specialist in London. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-521cdaf18a5d
• 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 21,013 miles. Price: £136,490, £52,499 more than this car. Dealer: Group 1 Automotive Mercedes-Benz of Nottingham in Nottingham. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-231263506eb5

• The nearest: 2021 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black, 9 miles from this car. Mileage: 65,600 miles. Price: £115,990, £31,999 more than this car. Dealer: 51 X in Birmingham. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-3afb1ad52c7c