2018 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: 2018
• Mileage: 38,492 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 5 seats
• Engine: 4.0 litres, 577 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Blue
• CO2: 299 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Mercedes-Benz G Class AMG has covered 38,492 miles, around 13,500 fewer miles than is typical for its age. Its asking price of £118,795 is £1,056 above the AskCar estimate of £117,739. The AskCar estimate draws on 408 Mercedes-Benz G Class adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 12 days ago. Its asking price has since fallen by £1,200. We checked its advertised mileage against the government's MOT record, and they match. The seller is Gibbons Automotive, based in Westbury. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,056 (under 1%) over the AskCar estimate of £117,739.

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 6 November 2026.

A 2018 Mercedes-Benz G Class with the 4.0 petrol engine is typically advertised at £117,900: the median of the 16 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2018 Mercedes-Benz G Class has been on sale for at least 12 days.

Price history

AskCar first saw this advert on 25 October 2026 at £119,995. Its asking price is now £118,795, £1,200 less. The latest price cut was seen on 5 November 2026.

Price changes recorded:

• 25 October 2026: £119,995
• 4 November 2026: £118,995
• 5 November 2026: £118,795

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 8 December 2026.

It failed its MOT on 8 December 2025 (offside rear outer tyre has a cut in excess of the requirements deep enough to reach the ply or cords) and passed 1 day later, on 9 December 2025.

Advisories at the latest test: offside front inner play in steering rack inner joint(s).

Mileage at that test: 32,727 miles, which matches the advertised 38,492 miles.

Advertised mileage is about 13,500 miles lower than the median mileage of a 2018 Mercedes-Benz G Class on AskCar.

Similar cars

10 other 2018 Mercedes-Benz G Class AMG 4.0 petrol automatic SUVs are for sale at UK dealers, from £99,500 to £165,950, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2018 Mercedes-Benz G Class AMG, 4.0 petrol SUV, blue. Mileage: 47,000 miles. Price: £116,995, £1,800 less than this car. Dealer: GB Vehicles in Edgware. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2018-ccfa7d7c5a44
• 2018 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 24,000 miles. Price: £119,000, £205 more than this car. Dealer: Motonet.com in Coventry. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2018-650b9f55ba03
• 2018 Mercedes-Benz G Class AMG, 4.0 petrol SUV, black. Mileage: 54,500 miles. Price: £106,495, £12,300 less than this car. Dealer: Reverie Autos in Hatfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2018-65a44c636dc0

• The nearest: 2018 Mercedes-Benz G Class AMG, 4.0 petrol SUV, blue, 39 miles from this car. Mileage: 55,266 miles. Price: £104,490, £14,305 less than this car. Dealer: Marshall Motor Group Lamborghini Poole in Poole. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2018-12df1008446b