2021 Mercedes-Benz G Class 2.9 G400d AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: G Class
• Trim: AMG Line Premium
• Version: 2.9 G400d AMG Line Premium Auto 4WD Euro 6 5dr (325 bhp)
• Year: 2021
• Mileage: 66,552 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 5 seats
• Engine: 2.9 litres, 325 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 281 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 66,552 miles, this 2021 Mercedes-Benz G Class AMG Line Premium has covered about 30,600 more miles than other 2021 Mercedes-Benz G Class cars. Priced at £89,990, it is advertised £1,507 below the AskCar estimate of £91,497. The AskCar estimate uses 413 UK dealer adverts for the Mercedes-Benz G Class, with adjustments for age, mileage, trim, engine and other specifications. We have tracked this advert for 114 days. Its advertised mileage matches the government's MOT record. You can find this car at Prestige Cars Of Essex in Epping Forest. 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: £1,507 (1%) under the AskCar estimate of £91,497.

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 2021 Mercedes-Benz G Class with the 2.9 diesel engine is typically advertised at £100,900: the median of the 12 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2021 Mercedes-Benz G Class has been on sale for at least 114 days.

Price history

AskCar first saw this advert on 17 July 2026 at £88,990. Its asking price is now £89,990, £1,000 more.

Price changes recorded:

• 17 July 2026: £88,990
• 29 September 2026: £89,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 19 July 2027.

It has had 3 MOTs. The latest, on 13 July 2026, passed.

Advisories at the latest test: front brake disc worn, pitted or scored, but not seriously weakened both; rear brake disc worn, pitted or scored, but not seriously weakened both.

Mileage at that test: 66,571 miles, which matches the advertised 66,552 miles.

Advertised mileage is about 30,600 miles higher than the median mileage of a 2021 Mercedes-Benz G Class on AskCar.

Similar cars

6 other 2021 Mercedes-Benz G Class AMG Line Premium 2.9 diesel automatic SUVs are for sale at UK dealers, from £86,948 to £124,995, as of 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz G Class AMG Line Premium, 2.9 diesel SUV, black. Mileage: 58,000 miles. Price: £86,948, £3,042 less than this car. Dealer: Imperials -Chelmsford in Chelmsford. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-2606851e309a
• 2021 Mercedes-Benz G Class AMG Line Premium, 2.9 diesel SUV, black. Mileage: 55,000 miles. Price: £92,999, £3,009 more than this car. Dealer: Waterways Prestige in Leighton Buzzard. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-2b0556d4427a
• 2021 Mercedes-Benz G Class AMG Line Premium, 2.9 diesel SUV, blue. Mileage: 50,429 miles. Price: £95,500, £5,510 more than this car. Dealer: Sytner Group Mercedes-Benz of West London in London. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-9ccdbb759d1e