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: 57,794 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 7 seats
• Engine: 3.0 litres, 254 bhp
• Gearbox: Automatic (G-Tronic)
• Drive: Four-wheel drive
• Colour: Black
• CO2: 199 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Mercedes-Benz GLS AMG Line has covered 57,794 miles. The AskCar estimate for this car is £30,763. It is priced at £28,990, which is £1,773 below that estimate. The AskCar estimate uses UK dealer asking prices, including 143 Mercedes-Benz GLS adverts, and accounts for the car’s age, mileage and specification. Since we first spotted the advert 51 days ago, the asking price has dropped by £1,000. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is for sale at Penistone Motor Group in Sheffield. 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

Fair price: £1,773 (5%) under the AskCar estimate of £30,763.

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 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 8 November 2026.

Time on sale

This 2018 Mercedes-Benz GLS has been on sale for at least 51 days.

Price history

AskCar first saw this advert on 18 September 2026 at £29,990. Its asking price is now £28,990, £1,000 less. The latest price cut was seen on 6 November 2026.

Price changes recorded:

• 18 September 2026: £29,990
• 6 November 2026: £28,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 19 May 2027.

It has had 7 MOTs. The latest, on 20 May 2026, passed.

Advisories at the latest test: nearside rear tyre worn close to legal limit/worn on edge; offside rear tyre worn close to legal limit/worn on edge.

Mileage at that test: 55,495 miles, which matches the advertised 57,794 miles.

Advertised mileage is about 600 miles lower 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 8 November 2026.

The 3 closest to this car in mileage:

• 2018 Mercedes-Benz GLS AMG Line, 3.0 diesel SUV, grey. Mileage: 59,000 miles. Price: £28,495, £495 less than this car. Dealer: Apex Motor House in Farnham. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2018-474b7b607784
• 2018 Mercedes-Benz GLS AMG Line, 3.0 diesel SUV, grey. Mileage: 55,000 miles. Price: £29,995, £1,005 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, £2,310 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, white, 35 miles from this car. Mileage: 47,220 miles. Price: £28,899, £91 less than this car. Dealer: Fords of Winsford Manchester in Manchester. AskCar page: https://askcar.co.uk/car/mercedes-benz-gls-2018-9285f4710095