2021 Mercedes-Benz G Class 2.9 G400d AMG Line Premium Plus

Overview

• Make: Mercedes-Benz
• Model: G Class
• Trim: AMG Line Premium Plus
• Version: 2.9 G400d AMG Line Premium Plus G-Tronic 4WD Euro 6 (s/s) 5dr (325 bhp)
• Year: 2021
• Mileage: 20,000 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 5 seats
• Engine: 2.9 litres, 325 bhp
• Gearbox: Automatic (G-Tronic)
• Drive: Four-wheel drive
• Colour: White
• CO2: 289 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Mercedes-Benz G Class AMG Line Premium Plus has covered 20,000 miles, around 16,000 fewer miles than is typical for its age. Its asking price of £99,995 is £10,166 below the AskCar estimate of £110,161. The AskCar estimate uses 404 UK dealer adverts for the Mercedes-Benz G Class, with adjustments for age, mileage, trim, engine and other specifications. It first appeared in our advert records 2 days ago. Its advertised mileage matches the government's MOT record. You can find this car at M.W. Trade Cars in Dudley. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Good value: £10,166 (9%) under the AskCar estimate of £110,161.

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 404 priced Mercedes-Benz G Class adverts across different ages and specifications, as of 5 November 2026.

A 2021 Mercedes-Benz G Class with the 2.9 diesel engine is typically advertised at £100,000: the median of the 11 for sale on AskCar, as of 5 November 2026.

Time on sale

AskCar first saw this 2021 Mercedes-Benz G Class advertised 2 days ago.

Price history

AskCar first saw this advert on 3 November 2026 at £99,995. 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 5 November 2026: valid until 16 March 2027.

It has had one MOT, on 17 March 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 12,686 miles, which matches the advertised 20,000 miles.

Advertised mileage is about 16,000 miles lower than the median mileage of a 2021 Mercedes-Benz G Class on AskCar.

Similar cars

3 other 2021 Mercedes-Benz G Class AMG Line Premium Plus 2.9 diesel automatic SUVs are for sale at UK dealers, from £99,900 to £105,000, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2021 Mercedes-Benz G Class AMG Line Premium Plus, 2.9 diesel SUV, white. Mileage: 19,641 miles. Price: £99,900, £95 less than this car. Dealer: Apex Performance Centre in Loughborough. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-317c55425c28
• 2021 Mercedes-Benz G Class AMG Line Premium Plus, 2.9 diesel SUV, green. Mileage: 35,000 miles. Price: £104,990, £4,995 more than this car. Dealer: Manor Classic Cars in York. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-394fc3f62308
• 2021 Mercedes-Benz G Class AMG Line Premium Plus, 2.9 diesel SUV, black. Mileage: 73,000 miles. Price: £105,000, £5,005 more than this car. Dealer: Signature Car Group in Rochford. AskCar page: https://askcar.co.uk/car/mercedes-benz-g-class-2021-8c8b30bc6261