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: 28,403 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

This 2020 Mercedes-Benz G Class AMG has covered 28,403 miles. The dealer is asking £134,995, which is £1,232 below the AskCar estimate of £136,227. To work out the AskCar estimate, we analyse UK dealer adverts for 413 Mercedes-Benz G Class cars across different ages and specifications. We have tracked this advert for 105 days. The advertised mileage is lower than the latest MOT reading of 29,693 miles. Ask the dealer to explain. The recorded MOT expired on 18 September 2026, so ask the dealer whether it has been renewed. It is advertised by RPM Motors (N.I.) in Crumlin. 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: £1,232 (under 1%) under the AskCar estimate of £136,227.

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 105 days.

Price history

AskCar first saw this advert on 26 July 2026 at £134,995. 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: the latest record we hold ran out on 18 September 2026; ask the dealer for the current MOT.

It has had 3 MOTs. The latest, on 19 September 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 29,693 miles. The advert says 28,403 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 16,500 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: 26,000 miles. Price: £229,995, £95,000 more than this car. Dealer: Polo Prestige in Sittingbourne. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-347cd29c6b42
• 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, green. Mileage: 25,000 miles. Price: £127,995, £7,000 less than this car. Dealer: The Motoring Team in Chesham. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-1d422cff096f
• 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 36,000 miles. Price: £129,995, £5,000 less than this car. Dealer: Hampton Car Sales in Milton Malsor. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-206f2b7a190d

• The nearest: 2020 Mercedes-Benz G Class AMG, 4.0 petrol SUV, silver, 119 miles from this car. Mileage: 47,000 miles. Price: £129,995, £5,000 less than this car. Dealer: Driven Motor Company in Glasgow. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2020-99e5e65e91dc