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: 42,500 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 42,500 miles, this 2020 Mercedes-Benz G Class AMG has covered about 2,400 fewer miles than other 2020 Mercedes-Benz G Class cars. The AskCar estimate for this car is £126,414. It is priced at £144,950, which is £18,536 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 413 Mercedes-Benz G Class cars across different ages and specifications. Since we first spotted the advert 156 days ago, the asking price has dropped by £5,000. According to the government's MOT record, its advertised mileage is consistent with the latest test. You can find this car at Asean Corporation in London. 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: £18,536 (14%) over the AskCar estimate of £126,414.

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 156 days.

Price history

AskCar first saw this advert on 5 June 2026 at £149,950. Its asking price is now £144,950, £5,000 less. The latest price cut was seen on 23 July 2026.

Price changes recorded:

• 5 June 2026: £149,950
• 23 July 2026: £144,950

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 15 January 2027.

It has had 3 MOTs. The latest, on 8 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 37,002 miles, which matches the advertised 42,500 miles.

Advertised mileage is about 2,400 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, silver. Mileage: 43,000 miles. Price: £125,000, £19,950 less than this car. Dealer: PF Car Sales in Burton upon Trent. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-2d74f66b8251
• 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 40,916 miles. Price: £119,995, £24,955 less than this car. Dealer: FLX Automotive in Enfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-a0910cdec2f9
• 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 44,557 miles. Price: £130,000, £14,950 less than this car. Dealer: Strafford Cars in Brighton and Hove. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-2c27596b4dbd

• The nearest: 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black, 1 miles from this car. Mileage: 3,506 miles. Price: £240,000, £95,050 more than this car. Dealer: Berkeley Motor Group in Greenford. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-9e4575f4983e