2018 Mercedes-Benz GLS 3.0 GLS350d V6 AMG Line

Overview

• Make: Mercedes-Benz
• Model: GLS
• Trim: AMG Line
• Version: 3.0 GLS350d V6 AMG Line G-Tronic 4WD Euro 6 (s/s) 5dr (254 bhp)
• Year: 2018
• Mileage: 59,000 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 7 seats
• Engine: 3.0 litres, 254 bhp
• Gearbox: Automatic (G-Tronic)
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 199 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Mercedes-Benz GLS AMG Line has covered 59,000 miles. Its asking price of £28,495 is £2,067 below the AskCar estimate of £30,562. 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 162 days ago. The seller is Apex Motor House, based in Farnham. 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: £2,067 (6%) under the AskCar estimate of £30,562.

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.

A 2018 Mercedes-Benz GLS with the 3.0 diesel engine is typically advertised at £30,000: the median of the 15 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2018 Mercedes-Benz GLS has been on sale for at least 162 days.

Price history

AskCar first saw this advert on 28 May 2026 at £28,495. Its asking price has not changed.

Mileage and MOT

Advertised mileage is about 600 miles higher than the median mileage of a 2018 Mercedes-Benz GLS on AskCar.

Similar cars

10 other 2018 Mercedes-Benz GLS AMG Line 3.0 diesel automatic SUVs are for sale at UK dealers, from £23,500 to £37,500, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2018 Mercedes-Benz GLS AMG Line, 3.0 diesel SUV, black. Mileage: 57,794 miles. Price: £28,990, £495 more than this car. Dealer: Penistone Motor Group in Sheffield. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2018-f4dbcaa00e10
• 2018 Mercedes-Benz GLS AMG Line, 3.0 diesel SUV, grey. Mileage: 55,000 miles. Price: £29,995, £1,500 more than this car. Dealer: S & R Motors in Swindon. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2018-c646c9b052d9
• 2018 Mercedes-Benz GLS AMG Line, 3.0 diesel SUV, white. Mileage: 51,411 miles. Price: £31,300, £2,805 more than this car. Dealer: Saxtons.co.uk in Chelmsford. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2018-24629538050e

• The nearest: 2018 Mercedes-Benz GLS AMG Line, 3.0 diesel SUV, silver, 40 miles from this car. Mileage: 85,647 miles. Price: £25,500, £2,995 less than this car. Dealer: Car Planet Barnet in Barnet. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2018-6dd3f15d08f4