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: 46,064 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 is advertised with 46,064 miles, approximately 14,500 below the typical mileage for its age. Priced at £42,499, it is advertised £4,414 below the AskCar estimate of £46,913. To work out the AskCar estimate, we analyse UK dealer adverts for 143 Mercedes-Benz GLS cars across different ages and specifications. It first appeared in our advert records 8 days ago. We checked its advertised mileage against the government's MOT record, and they match. The seller is Hendy Kia / Mazda / Honda - Eastleigh, based in Eastleigh. 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

Good value: £4,414 (9%) under the AskCar estimate of £46,913.

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 8 days.

Price history

AskCar first saw this advert on 31 October 2026 at £42,499. 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 12 July 2027.

It has had 5 MOTs. The latest, on 17 June 2026, passed.

Advisories at the latest test: nearside front lower suspension arm pin or bush worn but not resulting in excessive movement rear bush on arm; offside front lower suspension arm pin or bush worn but not resulting in excessive movement rear bush on arm; nearside rear tyre worn close to legal limit/worn on edge 325 40 22; and 1 more.

Mileage at that test: 42,515 miles, which matches the advertised 46,064 miles.

Advertised mileage is about 14,500 miles lower 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 £39,995 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: 37,500 miles. Price: £48,495, £5,996 more than this car. Dealer: Quickars in Stoke Poges. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2020-5514d2038006
• 2020 Mercedes-Benz GLS AMG Line Premium, 2.9 diesel SUV, black. Mileage: 90,567 miles. Price: £39,995, £2,504 less than this car. Dealer: W R Cars in Bradford. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2020-8e8fa6a74139