2020 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: 2020
• Mileage: 36,000 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 5 seats
• Engine: 4.0 litres, 577 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 299 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 36,000 miles, this 2020 Mercedes-Benz G Class AMG has covered about 8,900 fewer miles than other 2020 Mercedes-Benz G Class cars. Its asking price of £129,995 is £959 below the AskCar estimate of £130,954. The AskCar estimate uses UK dealer asking prices, including 413 Mercedes-Benz G Class adverts, and accounts for the car’s age, mileage and specification. It first appeared in our advert records 68 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is advertised by Hampton Car Sales in Northampton. 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: £959 (under 1%) under the AskCar estimate of £130,954.

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 2020 Mercedes-Benz G Class with the 4.0 petrol engine is typically advertised at £125,000: the median of the 31 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2020 Mercedes-Benz G Class has been on sale for at least 68 days.

Price history

AskCar first saw this advert on 1 September 2026 at £129,995. 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 9 June 2027.

It has had 5 MOTs. The latest, on 10 June 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 34,821 miles, which matches the advertised 36,000 miles.

Advertised mileage is about 8,900 miles lower than the median mileage of a 2020 Mercedes-Benz G Class on AskCar.

Similar cars

26 other 2020 Mercedes-Benz G Class AMG 4.0 petrol automatic SUVs are for sale at UK dealers, from £107,949 to £240,000, as of 8 November 2026.

The 3 closest to this car in mileage:

• 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 36,295 miles. Price: £121,495, £8,500 less than this car. Dealer: Warford Cars in Altrincham. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-9b24530fd930
• 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 38,000 miles. Price: £128,995, £1,000 less than this car. Dealer: Car Hunters in Steeple. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-61ba6016312c
• 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 40,916 miles. Price: £119,995, £10,000 less than this car. Dealer: FLX Automotive in Enfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-a0910cdec2f9

• The nearest: 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, green, 37 miles from this car. Mileage: 25,000 miles. Price: £127,995, £2,000 less than this car. Dealer: The Motoring Team in Chesham. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-1d422cff096f