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: 17,825 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 2 seats
• Engine: 3.0 litres, 362 bhp
• Gearbox: Automatic (G-Tronic+)
• Drive: Rear-wheel drive
• Colour: Silver
• CO2: 175 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Mercedes-Benz SL AMG Line has covered 17,825 miles. Priced at £38,500, it is advertised £365 above the AskCar estimate of £38,135. The AskCar estimate uses 365 UK dealer adverts for the Mercedes-Benz SL, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 79 days ago. Its asking price has since fallen by £499. We checked its advertised mileage against the government's MOT record, and they match. It is advertised by Penguin Cars in Shrewsbury. 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: £365 (under 1%) over the AskCar estimate of £38,135.

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 365 priced Mercedes-Benz SL adverts across different ages and specifications, as of 6 November 2026.

Time on sale

This 2018 Mercedes-Benz SL has been on sale for at least 79 days.

Price history

AskCar first saw this advert on 19 August 2026 at £38,999. Its asking price is now £38,500, £499 less. The latest price cut was seen on 30 September 2026.

Price changes recorded:

• 19 August 2026: £38,999
• 30 September 2026: £38,500

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 21 May 2027.

It has had 6 MOTs. The latest, on 19 May 2026, passed.

Advisories at the latest test: tyre worn close to legal limit/worn on edge ALL X 4 TYRE HAVE SIGNS OF SLIGHT WEAR INNER EDGE (FRONT 255/35/19 ) (REAR 285/30/19 ).

Mileage at that test: 15,086 miles, which matches the advertised 17,825 miles.

Similar cars

3 other 2018 Mercedes-Benz SL AMG Line 3.0 petrol automatic convertibles are for sale at UK dealers, from £33,490 to £37,995, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2018 Mercedes-Benz SL AMG Line, 3.0 petrol convertible, grey. Mileage: 18,000 miles. Price: £37,980, £520 less 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, red. Mileage: 19,333 miles. Price: £37,995, £505 less 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, black. Mileage: 32,075 miles. Price: £33,490, £5,010 less than this car. Dealer: Wynyard Motor Company in Stockton-on-Tees. AskCar page: https://askcar.co.uk/car/mercedes-benz-sl-2018-478dd338ba3d