2020 Mercedes-Benz G Class 4.0

Overview

• Make: Mercedes-Benz
• Model: G Class
• Version: 4.0 9G-Tronic 4WD Euro 6 5dr (576 bhp)
• Year: 2020
• Mileage: 45,200 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 5 seats
• Engine: 4.0 litres, 576 bhp
• Gearbox: Automatic (9G-Tronic)
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 369 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

The advertised mileage for this 2020 Mercedes-Benz G Class is 45,200 miles. Priced at £118,750, it is advertised £2,963 below the AskCar estimate of £121,713. The AskCar estimate draws on 411 Mercedes-Benz G Class adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 54 days ago. Its asking price has since fallen by £11,240. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Stratstone Mercedes-Benz of Chelmsford, based in Chelmsford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 10 November 2026.

How we estimate prices and check cars

Price

Fair price: £2,963 (2%) under the AskCar estimate of £121,713.

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 411 priced Mercedes-Benz G Class adverts across different ages and specifications, as of 10 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 10 November 2026.

Time on sale

This 2020 Mercedes-Benz G Class has been on sale for at least 54 days.

Price history

AskCar first saw this advert on 17 September 2026 at £129,990. Its asking price is now £118,750, £11,240 less. The latest price cut was seen on 10 November 2026.

Price changes recorded:

• 17 September 2026: £129,990
• 25 September 2026: £128,767
• 7 October 2026: £128,210
• 8 October 2026: £127,990
• 19 October 2026: £126,950
• 28 October 2026: £123,950
• 7 November 2026: £119,000
• 10 November 2026: £118,750

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 10 November 2026: valid until 18 March 2027.

It has had 3 MOTs. The latest, on 19 March 2026, passed.

Advisories at the latest test: windscreen damaged but not adversely affecting driver's view; nearside front window excessively tinted but not adversely affecting driver's view; offside front window excessively tinted but not adversely affecting driver's view; and 4 more.

Mileage at that test: 41,455 miles, which matches the advertised 45,200 miles.

Advertised mileage is about 300 miles higher than the median mileage of a 2020 Mercedes-Benz G Class on AskCar.