2021 Mercedes-Benz G Class 4.0

Overview

• Make: Mercedes-Benz
• Model: G Class
• Version: 4.0 Auto 4WD Euro 6 5dr (576 bhp)
• Year: 2021
• Mileage: 39,777 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 5 seats
• Engine: 4.0 litres, 576 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 369 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 39,777 miles on the clock, this 2021 Mercedes-Benz G Class has done roughly 3,800 more miles than a typical 2021 Mercedes-Benz G Class. The dealer is asking £138,995, which is £4,299 above the AskCar estimate of £134,696. To work out the AskCar estimate, we analyse UK dealer adverts for 411 Mercedes-Benz G Class cars across different ages and specifications. Since we first spotted the advert 131 days ago, the asking price has dropped by £1,000. We checked its advertised mileage against the government's MOT record, and they match. You can find this car at A1 Auto Solutions in Maidenhead. 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: £4,299 (3%) over the AskCar estimate of £134,696.

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 2021 Mercedes-Benz G Class with the 4.0 petrol engine is typically advertised at £136,000: the median of the 32 for sale on AskCar, as of 10 November 2026.

Time on sale

This 2021 Mercedes-Benz G Class has been on sale for at least 131 days.

Price history

AskCar first saw this advert on 2 July 2026 at £139,995. Its asking price is now £138,995, £1,000 less. The latest price cut was seen on 17 October 2026.

Price changes recorded:

• 2 July 2026: £139,995
• 17 October 2026: £138,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 10 November 2026: valid until 2 July 2027.

It has had 5 MOTs. The latest, on 3 July 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 39,111 miles, which matches the advertised 39,777 miles.

Advertised mileage is about 3,800 miles higher than the median mileage of a 2021 Mercedes-Benz G Class on AskCar.