2018 Mercedes-Benz GLS 3.0 AMG Line

Overview

• Make: Mercedes-Benz
• Model: GLS
• Trim: AMG Line
• Version: 3.0 350d AMG Line 9G-Tronic 4WD Euro 6 5dr (254 bhp)
• Year: 2018
• Mileage: 73,083 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 7 seats
• Engine: 3.0 litres, 254 bhp
• Gearbox: Automatic (9G-Tronic)
• Drive: Four-wheel drive
• Colour: Silver
• CO2: 210 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Mercedes-Benz GLS AMG Line has covered 73,083 miles, around 14,700 more miles than is typical for its age. The dealer is asking £30,663, which is £2,607 above the AskCar estimate of £28,056. To work out the AskCar estimate, we analyse UK dealer adverts for 143 Mercedes-Benz GLS cars across different ages and specifications. We first saw this car advertised 21 days ago. Its asking price has since fallen by £1,327. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Lookers Mercedes-Benz of Canterbury, based in Canterbury. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 7 November 2026.

How we estimate prices and check cars

Price

Above the going rate: £2,607 (9%) over the AskCar estimate of £28,056.

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 7 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 7 November 2026.

Time on sale

This 2018 Mercedes-Benz GLS has been on sale for at least 21 days.

Price history

AskCar first saw this advert on 17 October 2026 at £31,990. Its asking price is now £30,663, £1,327 less. The latest price cut was seen on 5 November 2026.

Price changes recorded:

• 17 October 2026: £31,990
• 27 October 2026: £31,249
• 3 November 2026: £30,999
• 5 November 2026: £30,663

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 19 September 2027.

It has had 9 MOTs. The latest, on 7 September 2026, passed.

Advisories at the latest test: windscreen damaged but not adversely affecting driver's view CHIP IN WINDSCREEN.

Mileage at that test: 71,281 miles, which matches the advertised 73,083 miles.

Advertised mileage is about 14,700 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 7 November 2026.

The 3 closest to this car in mileage:

• 2018 Mercedes-Benz GLS AMG Line, 3.0 diesel SUV, white. Mileage: 68,750 miles. Price: £28,989, £1,674 less than this car. Dealer: A6 Motors in Luton. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2018-c1d4836b79e9
• 2018 Mercedes-Benz GLS AMG Line, 3.0 diesel SUV, silver. Mileage: 85,647 miles. Price: £25,500, £5,163 less than this car. Dealer: Car Planet Barnet in Barnet. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2018-6dd3f15d08f4
• 2018 Mercedes-Benz GLS AMG Line, 3.0 diesel SUV, grey. Mileage: 59,000 miles. Price: £28,495, £2,168 less than this car. Dealer: Apex Motor House in Farnham. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2018-474b7b607784

• The nearest: 2018 Mercedes-Benz GLS AMG Line, 3.0 diesel SUV, white, 29 miles from this car. Mileage: 29,000 miles. Price: £37,500, £6,837 more than this car. Dealer: E & E Car Sales in Canvey Island. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2018-799a044589ca