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: 36,295 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 36,295 miles, this 2020 Mercedes-Benz G Class AMG has covered about 8,600 fewer miles than other 2020 Mercedes-Benz G Class cars. Its asking price of £121,995 is £8,692 below the AskCar estimate of £130,687. The AskCar estimate uses 408 UK dealer adverts for the Mercedes-Benz G Class, with adjustments for age, mileage, trim, engine and other specifications. It first appeared in our advert records 36 days ago. Our latest MOT record expired on 15 October 2026. Check the current position with the dealer. We checked its advertised mileage against the government's MOT record, and they match. It is advertised by Warford Cars in Altrincham. 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: £8,692 (6%) under the AskCar estimate of £130,687.

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 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 7 November 2026.

Time on sale

This 2020 Mercedes-Benz G Class has been on sale for at least 36 days.

Price history

AskCar first saw this advert on 2 October 2026 at £121,995. 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 7 November 2026: the latest record we hold ran out on 15 October 2026; ask the dealer for the current MOT.

It has had 3 MOTs. The latest, on 16 October 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 29,904 miles, which matches the advertised 36,295 miles.

Advertised mileage is about 8,600 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 7 November 2026.

The 3 closest to this car in mileage:

• 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 36,000 miles. Price: £129,995, £8,000 more than this car. Dealer: Hampton Car Sales in Milton Malsor. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-206f2b7a190d
• 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 38,000 miles. Price: £128,995, £7,000 more 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, £2,000 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, black, 8 miles from this car. Mileage: 52,000 miles. Price: £117,990, £4,005 less than this car. Dealer: Per4mance Cars in Macclesfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-b27b7487607f