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: 46,282 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

The advertised mileage for this 2020 Mercedes-Benz G Class AMG is 46,282 miles. Its asking price of £123,950 is £105 above the AskCar estimate of £123,845. To work out the AskCar estimate, we analyse UK dealer adverts for 413 Mercedes-Benz G Class cars across different ages and specifications. We first recorded this advert 57 days ago, and its asking price has since fallen by £1,800. The government's MOT record matches its advertised mileage. You can find this car at Car Planet Barnet in New Southgate. 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: £105 (under 1%) over the AskCar estimate of £123,845.

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 57 days.

Price history

AskCar first saw this advert on 12 September 2026 at £125,750. Its asking price is now £123,950, £1,800 less. The latest price cut was seen on 2 November 2026.

Price changes recorded:

• 12 September 2026: £125,750
• 23 September 2026: £125,450
• 28 September 2026: £125,150
• 12 October 2026: £124,850
• 19 October 2026: £124,550
• 27 October 2026: £124,250
• 2 November 2026: £123,950

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 17 May 2027.

It has had 4 MOTs. The latest, on 18 May 2026, passed.

Advisories at the latest test: front brake pad(s) wearing thin; oil leak, but not excessive.

Mileage at that test: 44,288 miles, which matches the advertised 46,282 miles.

Advertised mileage is about 1,400 miles higher 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: 46,600 miles. Price: £116,990, £6,960 less than this car. Dealer: Southport Motor Company in Southport. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-72ae41b24384
• 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, silver. Mileage: 47,000 miles. Price: £129,995, £6,045 more than this car. Dealer: Driven Motor Company in Glasgow. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-99e5e65e91dc
• 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 44,557 miles. Price: £130,000, £6,050 more 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, 7 miles from this car. Mileage: 40,916 miles. Price: £119,995, £3,955 less than this car. Dealer: FLX Automotive in Enfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-a0910cdec2f9