2015 Mercedes-Benz SLK 2.1 SLK250 CDI

Overview

• Make: Mercedes-Benz
• Model: SLK
• Version: 2.1 SLK250 CDI G-Tronic+ RWD Euro 5 (s/s) 2dr (201 bhp)
• Year: 2015
• Mileage: 28,350 miles
• Fuel: Diesel
• Body: Convertible, 2 doors, 2 seats
• Engine: 2.1 litres, 201 bhp
• Gearbox: Automatic (G-Tronic+)
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 132 g/km
• Emissions standard: Euro 5

About this car

With 28,350 miles on the clock, this 2015 Mercedes-Benz SLK has done roughly 26,700 fewer miles than a typical 2015 Mercedes-Benz SLK. Its asking price of £10,890 is £128 below the AskCar estimate of £11,018. The AskCar estimate uses 417 UK dealer adverts for the Mercedes-Benz SLK, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 58 days ago, the asking price has dropped by £405. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is advertised by Athena Automotive in Bicester. 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: £128 (1%) under the AskCar estimate of £11,018.

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 417 priced Mercedes-Benz SLK adverts across different ages and specifications, as of 7 November 2026.

A 2015 Mercedes-Benz SLK with the 2.1 diesel engine is typically advertised at £9,600: the median of the 38 for sale on AskCar, as of 7 November 2026.

Time on sale

This 2015 Mercedes-Benz SLK has been on sale for at least 58 days.

Price history

AskCar first saw this advert on 10 September 2026 at £11,295. Its asking price is now £10,890, £405 less. The latest price cut was seen on 22 October 2026.

Price changes recorded:

• 10 September 2026: £11,295
• 1 October 2026: £10,995
• 12 October 2026: £10,895
• 17 October 2026: £10,495
• 22 October 2026: £9,999
• 6 November 2026: £10,890

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 21 April 2027.

It failed its MOT on 24 March 2026 (power steering malfunctioning; power steering component leaking; engine MIL inoperative or indicates a malfunction; and 1 more) and passed 29 days later, on 22 April 2026.

There were no advisories at the latest test.

Mileage at that test: 27,367 miles, which matches the advertised 28,350 miles.

Advertised mileage is about 26,700 miles lower than the median mileage of a 2015 Mercedes-Benz SLK on AskCar.