2020 Mercedes-Benz GLS 2.9 GLS400d AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: GLS
• Trim: AMG Line Premium
• Version: 2.9 GLS400d AMG Line Premium G-Tronic 4WD Euro 6 (s/s) 5dr (325 bhp)
• Year: 2020
• Mileage: 90,567 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 7 seats
• Engine: 2.9 litres, 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

This 2020 Mercedes-Benz GLS AMG Line Premium has covered 90,567 miles, around 30,000 more miles than is typical for its age. The AskCar estimate for this car is £35,002. It is priced at £39,995, which is £4,993 above that estimate. The AskCar estimate draws on 143 Mercedes-Benz GLS adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this car for sale 68 days ago. Its advertised mileage matches the government's MOT record. The seller is W R Cars, based in Bradford. 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

Above the going rate: £4,993 (14%) over the AskCar estimate of £35,002.

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 8 November 2026.

A 2020 Mercedes-Benz GLS with the 2.9 diesel engine is typically advertised at £45,400: the median of the 12 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2020 Mercedes-Benz GLS has been on sale for at least 68 days.

Price history

AskCar first saw this advert on 1 September 2026 at £39,995. 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 8 November 2026: valid until 10 November 2026.

It has had 4 MOTs. The latest, on 11 November 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 76,355 miles, which matches the advertised 90,567 miles.

Advertised mileage is about 30,000 miles higher than the median mileage of a 2020 Mercedes-Benz GLS on AskCar.

Similar cars

2 other 2020 Mercedes-Benz GLS AMG Line Premium 2.9 diesel automatic SUVs are for sale at UK dealers, from £42,499 to £48,495, as of 8 November 2026.

The 2 closest to this car in mileage:

• 2020 Mercedes-Benz GLS AMG Line Premium, 2.9 diesel SUV, black. Mileage: 46,064 miles. Price: £42,499, £2,504 more than this car. Dealer: Hendy Kia / Mazda / Honda - Eastleigh in Eastleigh. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2020-0a260b2e05b8
• 2020 Mercedes-Benz GLS AMG Line Premium, 2.9 diesel SUV, black. Mileage: 37,500 miles. Price: £48,495, £8,500 more than this car. Dealer: Quickars in Stoke Poges. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2020-5514d2038006