2004 Mercedes-Benz SLK 2.3 Kompressor
Price: £5,490. Fair price: £289 (5%) over the AskCar estimate of £5,201, 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 8 November 2026.
AskCar lists 467 used Mercedes-Benz SLK from 364 UK dealerships, as of 8 November 2026.
Overview
- Make: Mercedes-Benz
- Model: SLK
- Trim: Kompressor
- Version: 2.3 Kompressor Auto RWD Euro 3 2dr (197 bhp)
- Year: 2004
- Mileage: 10,000 miles
- Fuel: Petrol
- Body: Convertible, 2 doors, 2 seats
- Engine: 2.3 litres, 197 bhp
- Gearbox: Automatic
- Drive: Rear-wheel drive
- Colour: Blue
- CO2: 235 g/km
- Emissions standard: Euro 3
About this car
This 2004 Mercedes-Benz SLK Kompressor has covered 10,000 miles. Priced at £5,490, it is advertised £289 above the AskCar estimate of £5,201. To work out the AskCar estimate, we analyse UK dealer adverts for 417 Mercedes-Benz SLK cars across different ages and specifications. We have tracked this advert for 76 days. The last MOT shows 35,801 miles, more than the advert. This is worth checking with the dealer. The recorded MOT expired on 7 October 2026, so ask the dealer whether it has been renewed. It is advertised by Sleaford Car Centre in Peterborough. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 8 November 2026.
Price
Fair price: £289 (5%) over the AskCar estimate of £5,201.
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 8 November 2026.
Time on sale
This 2004 Mercedes-Benz SLK has been on sale for at least 76 days.
Price history
AskCar first saw this advert on 24 August 2026 at £5,490. 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 8 November 2026: the latest record we hold ran out on 7 October 2026; ask the dealer for the current MOT.
It has had 24 MOTs. The latest, on 4 October 2025, passed.
Advisories at the latest test: front tyre slightly damaged/cracking or perishing.
Mileage at that test: 35,801 miles. The advert says 10,000 miles, fewer than the MOT record, so ask the dealer which is right.
Advertised mileage is about 55,200 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 £4,990 to £4,995, as of 8 November 2026.
The 2 closest to this car in mileage:
- 2004 Mercedes-Benz SLK Kompressor, 2.3 petrol convertible, silver. Mileage: 36,237 miles. Price: £4,990, £500 less than this car. Dealer: HMC in Chesham. AskCar page: https://askcar.co.uk/car/mercedes-benz-slk-2004-d59c833617d7
- 2004 Mercedes-Benz SLK Kompressor, 2.3 petrol convertible, silver. Mileage: 45,402 miles. Price: £4,995, £495 less than this car. Dealer: Stretton Of Kew in Southport. AskCar page: https://askcar.co.uk/car/mercedes-benz-slk-2004-ed79b828ce31
Browse all Mercedes-Benz SLK cars for sale · 2004 Mercedes-Benz SLK price guide
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Photos
11 photos of this car are on its AskCar page.
As of 8 November 2026, AskCar lists 595,629 cars and vans from 12,891 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.