2018 Mercedes-Benz C Class 2.0 C300d AMG Line Premium

Overview

• Make: Mercedes-Benz
• Model: C Class
• Trim: AMG Line Premium
• Version: 2.0 C300d AMG Line Premium G-Tronic+ RWD Euro 6 (s/s) 2dr Cabriolet (242 bhp)
• Year: 2018
• Mileage: 39,009 miles
• Fuel: Diesel
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 242 bhp
• Gearbox: Automatic (G-Tronic+)
• Drive: Rear-wheel drive
• Colour: White
• CO2: 138 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Mercedes-Benz C Class AMG Line Premium has covered 39,009 miles, around 27,000 fewer miles than is typical for its age. Priced at £18,990, it is advertised £1,103 above the AskCar estimate of £17,887. To work out the AskCar estimate, we analyse UK dealer adverts for 4,622 Mercedes-Benz C Class cars across different ages and specifications. The asking price is now £1,000 lower than when we first recorded the advert 163 days ago. Its advertised mileage matches the government's MOT record. You can find this car at Spa Motors Mid Wales in Brecon. 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

Fair price: £1,103 (6%) over the AskCar estimate of £17,887.

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 4,622 priced Mercedes-Benz C Class adverts across different ages and specifications, as of 7 November 2026.

A 2018 Mercedes-Benz C Class with the 2.0 diesel engine is typically advertised at £14,000: the median of the 166 for sale on AskCar, as of 7 November 2026.

Time on sale

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

Price history

AskCar first saw this advert on 28 May 2026 at £19,990. Its asking price is now £18,990, £1,000 less. The latest price cut was seen on 31 July 2026.

Price changes recorded:

• 29 May 2026: £19,990
• 31 July 2026: £18,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 30 December 2026.

It has had 6 MOTs. The latest, on 18 June 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 39,088 miles, which matches the advertised 39,009 miles.

Advertised mileage is about 27,000 miles lower than the median mileage of a 2018 Mercedes-Benz C Class on AskCar.

Similar cars

5 other 2018 Mercedes-Benz C Class AMG Line Premium 2.0 diesel automatic convertibles are for sale at UK dealers, from £15,033 to £18,499, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2018 Mercedes-Benz C Class AMG Line Premium, 2.0 diesel convertible, blue. Mileage: 41,839 miles. Price: £18,100, £890 less than this car. Dealer: Essex Car Company in Rainham. AskCar page: https://askcar.co.uk/car/mercedes-benz-c-class-2018-ff58fe927cd9
• 2018 Mercedes-Benz C Class AMG Line Premium, 2.0 diesel convertible, silver. Mileage: 46,600 miles. Price: £18,499, £491 less than this car. Dealer: Blakedown Car Company in Wombourne. AskCar page: https://askcar.co.uk/car/mercedes-benz-c-class-2018-7d5b68c0ad0a
• 2018 Mercedes-Benz C Class AMG Line Premium, 2.0 diesel convertible, blue. Mileage: 64,660 miles. Price: £15,033, £3,957 less than this car. Dealer: Cargem in Rainham. AskCar page: https://askcar.co.uk/car/mercedes-benz-c-class-2018-e149b96c16e5