2018 Mercedes-Benz SL 3.0 SL400 V6 AMG Line

Overview

• Make: Mercedes-Benz
• Model: SL
• Trim: AMG Line
• Version: 3.0 SL400 V6 AMG Line G-Tronic+ RWD Euro 6 (s/s) 2dr Roadster (362 bhp)
• Year: 2018
• Mileage: 32,075 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 2 seats
• Engine: 3.0 litres, 362 bhp
• Gearbox: Automatic (G-Tronic+)
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 175 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Mercedes-Benz SL AMG Line is advertised with 32,075 miles on the clock. Priced at £33,490, it is advertised £1,677 below the AskCar estimate of £35,167. The AskCar estimate uses UK dealer asking prices, including 372 Mercedes-Benz SL adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 41 days ago. Its asking price has since fallen by £1,000. We checked its advertised mileage against the government's MOT record, and they match. It is advertised by Wynyard Motor Company in Stockton-on-Tees. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,677 (4%) under the AskCar estimate of £35,167.

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 372 priced Mercedes-Benz SL adverts across different ages and specifications, as of 5 November 2026.

Time on sale

This 2018 Mercedes-Benz SL has been on sale for at least 41 days.

Price history

AskCar first saw this advert on 25 September 2026 at £34,490. Its asking price is now £33,490, £1,000 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 25 September 2026: £34,490
• 4 October 2026: £33,990
• 12 October 2026: £32,990
• 20 October 2026: £32,790
• 28 October 2026: £32,490
• 29 October 2026: £33,490

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 26 March 2027.

It has had 9 MOTs. The latest, on 23 March 2026, passed.

Advisories at the latest test: offside front lower suspension arm ball joint has slight play.

Mileage at that test: 30,604 miles, which matches the advertised 32,075 miles.

Similar cars

3 other 2018 Mercedes-Benz SL AMG Line 3.0 petrol automatic convertibles are for sale at UK dealers, from £37,995 to £38,500, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2018 Mercedes-Benz SL AMG Line, 3.0 petrol convertible, red. Mileage: 19,333 miles. Price: £37,995, £4,505 more than this car. Dealer: Parkway Specialist Cars in Mansfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-sl-2018-7fbf8b2d131a
• 2018 Mercedes-Benz SL AMG Line, 3.0 petrol convertible, grey. Mileage: 18,000 miles. Price: £38,480, £4,990 more than this car. Dealer: Auto100.Co.Uk in Sutton in Ashfield. AskCar page: https://askcar.co.uk/car/mercedes-benz-sl-2018-69de28c78bb2
• 2018 Mercedes-Benz SL AMG Line, 3.0 petrol convertible, silver. Mileage: 17,825 miles. Price: £38,500, £5,010 more than this car. Dealer: Penguin Cars in Shrewsbury. AskCar page: https://askcar.co.uk/car/mercedes-benz-sl-2018-6424f2cb9f9a