2021 Mercedes-Benz GLS GLS400d AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: GLS
• Trim: AMG Line Premium
• Version: AMG Line Premium G-Tronic 4WD Euro 6 5dr (325 bhp)
• Year: 2021
• Mileage: 43,995 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 7 seats
• Engine: 325 bhp
• Gearbox: Automatic (G-Tronic)
• Drive: Four-wheel drive
• Colour: Black
• CO2: 231 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 43,995 miles on the clock, this 2021 Mercedes-Benz GLS AMG Line Premium has done roughly 13,600 fewer miles than a typical 2021 Mercedes-Benz GLS. The dealer is asking £49,990, which is £544 above the AskCar estimate of £49,446. To work out the AskCar estimate, we analyse UK dealer adverts for 143 Mercedes-Benz GLS cars across different ages and specifications. This car was first seen in our listings data today. It is for sale at Acklam Cars in Middlesbrough. 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: £544 (1%) over the AskCar estimate of £49,446.

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 143 priced Mercedes-Benz GLS adverts across different ages and specifications, as of 6 November 2026.

Time on sale

AskCar first saw this 2021 Mercedes-Benz GLS advertised today.

Price history

AskCar first saw this advert on 6 November 2026 at £49,990. Its asking price has not changed.

Mileage and MOT

Advertised mileage is about 13,600 miles lower than the median mileage of a 2021 Mercedes-Benz GLS on AskCar.