2018 Mercedes-Benz S Class 2.9 S350d AMG Line

Overview

• Make: Mercedes-Benz
• Model: S Class
• Trim: AMG Line
• Version: 2.9 S350d AMG Line G-Tronic+ RWD Euro 6 (s/s) 4dr (282 bhp)
• Year: 2018
• Mileage: 10,000 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.9 litres, 282 bhp
• Gearbox: Automatic (G-Tronic+)
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 153 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Mercedes-Benz S Class AMG Line has covered 10,000 miles. Priced at £20,000, this car is advertised £13,558 below the AskCar estimate of £33,558. This is a large price difference, so check the price and vehicle details with the dealer. The AskCar estimate uses UK dealer asking prices, including 568 Mercedes-Benz S Class adverts, and accounts for the car’s age, mileage and specification. We first recorded this advert 163 days ago, and its asking price has since fallen by £1,950. The advertised mileage is lower than the latest MOT reading of 71,319 miles. Ask the dealer to explain. Its MOT is recorded as valid until 27 April 2027. The seller is Car Firm Peterborough, based in Peterborough. 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

Far below the going rate: £13,558 (40%) under the AskCar estimate of £33,558. Worth asking the dealer why.

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 568 priced Mercedes-Benz S Class adverts across different ages and specifications, as of 7 November 2026.

A 2018 Mercedes-Benz S Class with the 2.9 diesel engine is typically advertised at £24,000: the median of the 50 for sale on AskCar, as of 7 November 2026.

Time on sale

This 2018 Mercedes-Benz S Class has been on sale for at least 163 days.

Price history

AskCar first saw this advert on 28 May 2026 at £21,950. Its asking price is now £20,000, £1,950 less. The latest price cut was seen on 28 September 2026.

Price changes recorded:

• 28 May 2026: £21,950
• 10 July 2026: £20,950
• 28 September 2026: £20,000

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 27 April 2027.

It has had 6 MOTs. The latest, on 28 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 71,319 miles. The advert says 10,000 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 66,800 miles lower than the median mileage of a 2018 Mercedes-Benz S Class on AskCar.

Similar cars

9 other 2018 Mercedes-Benz S Class AMG Line 2.9 diesel automatic saloons are for sale at UK dealers, from £19,070 to £26,995, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2018 Mercedes-Benz S Class AMG Line, 2.9 diesel saloon, black. Mileage: 32,000 miles. Price: £25,000, £5,000 more than this car. Dealer: MB Specialist in London. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2018-a0c70f9db27d
• 2018 Mercedes-Benz S Class AMG Line, 2.9 diesel saloon, black. Mileage: 39,993 miles. Price: £24,490, £4,490 more than this car. Dealer: P W Millar Ford in Barry. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2018-1e4ebad74085
• 2018 Mercedes-Benz S Class AMG Line, 2.9 diesel saloon, black. Mileage: 52,000 miles. Price: £23,999, £3,999 more than this car. Dealer: Lookers in Belfast. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2018-6dfef3e1536e

• The nearest: 2018 Mercedes-Benz S Class AMG Line, 2.9 diesel saloon, grey, 53 miles from this car. Mileage: 88,625 miles. Price: £19,070, £930 less than this car. Dealer: Evans Halshaw MG Banbury in Banbury. AskCar page: https://askcar.co.uk/car/mercedes-benz-s-class-2018-54e0f933d273