2004 Mercedes-Benz SLK 2.3 SLK230 Kompressor
Price: £4,990. Fair price: £319 (6%) over the AskCar estimate of £4,671, our expected asking price for this car from its model, age, mileage and specification, drawing on 417 priced Mercedes-Benz SLK adverts on AskCar as of 7 November 2026.
AskCar lists 471 used Mercedes-Benz SLK from 369 UK dealerships, as of 7 November 2026.
Overview
- Make: Mercedes-Benz
- Model: SLK
- Trim: Kompressor
- Version: 2.3 SLK230 Kompressor Auto RWD Euro 3 2dr (197 bhp)
- Year: 2004
- Mileage: 36,237 miles
- Fuel: Petrol
- Body: Convertible, 2 doors, 2 seats
- Engine: 2.3 litres, 197 bhp
- Gearbox: Automatic
- Drive: Rear-wheel drive
- Colour: Silver
- CO2: 235 g/km
- Emissions standard: Euro 3
About this car
This 2004 Mercedes-Benz SLK Kompressor has covered 36,237 miles, around 29,000 fewer miles than is typical for its age. Priced at £4,990, it is advertised £319 above the AskCar estimate of £4,671. The AskCar estimate uses 417 UK dealer adverts for the Mercedes-Benz SLK, with adjustments for age, mileage, trim, engine and other specifications. We have tracked this advert for 163 days. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is HMC, based in Chesham. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 7 November 2026.
Price
Fair price: £319 (6%) over the AskCar estimate of £4,671.
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.
Time on sale
This 2004 Mercedes-Benz SLK has been on sale for at least 163 days.
Price history
AskCar first saw this advert on 28 May 2026 at £4,990. Its asking price has not changed.
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 11 May 2027.
It has had 22 MOTs. The latest, on 12 May 2026, passed.
There were no advisories at the latest test.
Mileage at that test: 36,333 miles, which matches the advertised 36,237 miles.
Advertised mileage is about 29,000 miles lower than the median mileage of a 2004 Mercedes-Benz SLK on AskCar.
Similar cars
2 other 2004 Mercedes-Benz SLK Kompressor 2.3 petrol automatic convertibles are for sale at UK dealers, from £4,995 to £5,490, as of 7 November 2026.
The 2 closest to this car in mileage:
- 2004 Mercedes-Benz SLK Kompressor, 2.3 petrol convertible, silver. Mileage: 45,402 miles. Price: £4,995, the same price as this car. Dealer: Stretton Of Kew in Southport. AskCar page: https://askcar.co.uk/car/mercedes-benz-slk-2004-ed79b828ce31
- 2004 Mercedes-Benz SLK Kompressor, 2.3 petrol convertible, blue. Mileage: 10,000 miles. Price: £5,490, £500 more than this car. Dealer: Sleaford Car Centre in Peterborough. AskCar page: https://askcar.co.uk/car/mercedes-benz-slk-2004-4594f843753f
Browse all Mercedes-Benz SLK cars for sale · 2004 Mercedes-Benz SLK price guide
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Photos
88 photos of this car are on its AskCar page.
As of 7 November 2026, AskCar lists 601,018 cars and vans from 12,892 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.