Mercedes SLK230 Valuation: 92 ads analysed

Market overviewWhat is the fair price of a used Mercedes SLK230? We have 92 for sale. Prices from £2,350 to £4,290. See variants (Edition) and check the valuation.

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Good price

Fair price

A bit pricey

Expensive

1 / 4

Used (2003) Mercedes SLK230 | Fair price

SLK **MAKE US AN OFFER!!**2.3

  • 2003
  • 64,707 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Fair price

£3,095
£2,500
Marketplace
PR4 0XL Preston, Lancashire
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-12%
1 / 4

Used (2002) Mercedes SLK230 | Fair price

SLK 2dr Tip Auto

  • 2002
  • 73,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Fair price

£3,495
£3,995
Marketplace
S65 3ST Dalton Magna, South Yorkshire
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1 / 1

Used (1998) Mercedes SLK230 | Fair price

SLK2dr Auto

  • 1998
  • 103,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Fair price

£1,495
Marketplace
SO40 3DN Totton, Hampshire
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1 / 4

Used (2000) Mercedes SLK230 | Fair price

2dr Auto 2.3

  • 2000
  • 74,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Fair price

£2,950
Dealer
CF11 9LJ Cardiff
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1 / 3

Used (1998) Mercedes SLK230 | Fair price

2dr Auto 2.3

  • 1998
  • 74,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Fair price

£2,699
Dealer
CF11 9LJ Cardiff
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1 / 4

Used (2001) Mercedes SLK230 | Fair price

SLK 2.3

  • 2001
  • 74,562 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Fair price

£2,989
Dealer
CF11 9LJ Cardiff
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1 / 4

Used (2001) Mercedes SLK230 | Fair price

SLK 2.3

  • 2001
  • 67,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Fair price

£3,000
Dealer
CF11 9LJ Cardiff
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Used (2003) Mercedes SLK230 | Fair price

SLK 2.3 Kompressor

  • 2003
  • 97,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Fair price

£1,995
Marketplace
NG34 0BP Sleaford, Lincolnshire
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1 / 4

Used (2003) Mercedes SLK230 | A bit pricey

SLK-Class2dr Tip Auto Rare Blue

  • 2003
  • 127,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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A bit pricey

£2,995
Marketplace
CH6 5FZ Flint, Cheshire
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1 / 2

Used (1998) Mercedes SLK230 | A bit pricey

2dr Auto 2.3

  • 1998
  • 56,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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A bit pricey

£3,990
Dealer
CF11 9LJ Cardiff
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1 / 4

Used (2000) Mercedes SLK230 | A bit pricey

2dr Auto 2.3

  • 2000
  • 70,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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A bit pricey

£3,700
Dealer
CF11 9LJ Cardiff
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1 / 2

Used (2000) Mercedes SLK230 | A bit pricey

2dr Auto 2.3

  • 2000
  • 73,622 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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A bit pricey

£3,295
Dealer
CF11 9LJ Cardiff
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1 / 4

Used (1998) Mercedes SLK230 | Expensive

2dr Auto 2.3

  • 1998
  • 91,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Expensive

£2,795
Dealer
CF11 9LJ Cardiff
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1 / 2

Used (2001) Mercedes SLK230 | Expensive

2dr Auto 2.3

  • 2001
  • 100,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Expensive

£2,950
Dealer
CF11 9LJ Cardiff
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1 / 4

Used (1998) Mercedes SLK230 | Expensive

2dr Auto 2.3

  • 1998
  • 101,500 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Expensive

£2,795
Dealer
CF11 9LJ Cardiff
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1 / 3

Used (2000) Mercedes SLK230 | Expensive

2dr Auto 2.3

  • 2000
  • 95,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Expensive

£2,995
Dealer
CF11 9LJ Cardiff
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1 / 2

Used (2000) Mercedes SLK230 | Expensive

2dr Auto 2.3

  • 2000
  • 89,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Expensive

£3,150
Dealer
CF11 9LJ Cardiff
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1 / 3

Used (1998) Mercedes SLK230 | Expensive

2dr Auto 2.3

  • 1998
  • 75,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Expensive

£3,495
Dealer
CF11 9LJ Cardiff
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1 / 3

Used (2000) Mercedes SLK230 | Expensive

2dr Auto 2.3

  • 2000
  • 76,694 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Expensive

£4,000
Dealer
CF11 9LJ Cardiff
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1 / 4

Used (2001) Mercedes SLK230 | Expensive

2dr Auto 2.3

  • 2001
  • 80,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Expensive

£4,000
Dealer
CF11 9LJ Cardiff
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1 / 4

Used (2000) Mercedes SLK230 | Expensive

2dr Auto 2.3

  • 2000
  • 95,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Expensive

£3,395
Dealer
CF11 9LJ Cardiff
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1 / 1

Used (2000) Mercedes SLK230 | Expensive

2dr Auto 2.3

  • 2000
  • 97,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
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Expensive

£3,299
Dealer
CF11 9LJ Cardiff
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1 / 4

Used (1997) Mercedes SLK230 | Rare vehicle

SLK 2.3 Kompressor Kompressor

  • 1997
  • 130,000 miles
  • 1.5L Petrol
  • Cabriolet
  • Automatic
  • Details
£2,995
Rare vehicle
Marketplace
GU33 7JH Liss, West Sussex
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Used (2016) Mercedes SLK230 Edition | Rare vehicle

SLK 2dr Auto

  • 2016
  • 61,316 miles
  • Trim levelEdition
  • 2.3L Petrol
  • Cabriolet
  • Manual
  • Details
£4,995
Rare vehicle
Marketplace
CH41 1AT Birkenhead, Merseyside
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Availability verified
-8%
1 / 4

Used (2004) Mercedes SLK230 | Rare vehicle

SLK2dr Tip Auto

  • 2004
  • 56,000 miles
  • 2.3L Petrol
  • Cabriolet
  • Automatic
  • Details
£2,295
£2,495
Rare vehicle
Marketplace
SS0 9PR Westcliff on Sea, Essex
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Showing 1 - 25 of 92 results

How much does the Mercedes SLK230 depreciate?

Used Mercedes SLK230

A used Mercedes SLK230 (1999) model gains about £0 per month in value.


Factors that affect the appreciation of a Mercedes SLK230:
- Mileage
- Age of the vehicle
- Number of previous owners
- Accidents or damage history
- Trim level, equipment, and options


Appreciation is an important part of calculating the total value of owning a Mercedes SLK230. In addition to the monthly appreciation of £0, you should also factor in fuel costs, road tax, insurance and maintenance (including tyres and car washes) to get the full monthly value.

Comparison of Mercedes SLK230 variants and prices

No market data available

Mercedes SLK230 (model year 1999) - Price development for the last 12 months and price projection for the next 6 months (January 2025 - June 2026)

Monthly price data with average prices and price ranges

Month

Average market price

Lowest market price

Highest market price

Calculation method

2025 - January
£3,400
£2,920£3,900
Estimate
2025 - February
£3,360
£2,880£3,840
Estimate
2025 - March
£3,400
£2,900£3,880
Estimate
2025 - April
£3,400
£2,900£3,880
Estimate
2025 - May
£3,380
£2,900£3,860
Estimate
2025 - June
£3,500
£3,060£3,920
Estimate
2025 - July
£3,480
£3,020£3,940
Estimate
2025 - August
£3,460
£3,020£3,880
Estimate
2025 - September
£3,440
£2,980£3,880
Estimate
2025 - October
£3,420
£2,960£3,880
Estimate
2025 - November
£3,420
£3,000£3,860
Estimate
2025 - December
£3,400
£2,980£3,840
Estimate
2026 - February
£3,380
--
Forecast
2026 - March
£3,380
--
Forecast
2026 - April
£3,360
--
Forecast
2026 - May
£3,340
--
Forecast
2026 - June
£3,340
--
Forecast

All estimates and forecasts are based on actual market data

Last updated: 27 January 2026

Average Monthly Depreciation

A summary of the past 12 and an estimation of the next 6 months.

Past 12 months

Next 6 months

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Super price

Good price

Fair price

A bit pricey

Expensive

Are you looking for a used Mercedes SLK230?

Are you thinking of getting a used sports car? Then the Mercedes SLK230 is a popular option. AutoUncle showcases a total of 103 cars compiled from different dealership websites and online marketplaces.

What should I pay for a used Mercedes SLK230?

A used Mercedes SLK230 costs between £2,000 for the cheapest variant and £5,495 for the most expensive model.

The used car price of an Mercedes SLK230 is determined by a number of factors, the most important of which are year of production, engine size and performance, fuel efficiency of the car, how many miles the car has travelled not to mention equipment level.

As an example, a newer model with fewer miles covered, or a high-end version boasting a potent engine, often fetches a top-tier price than, for example, an older model with more kilometres driven or with a lower equipment level.

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What are the available fuel options for the Mercedes SLK230?

The most popular fuel type for the Mercedes SLK230 is petrol.

Your current driving habit is a determining factor when it comes to picking a fuel type. Is your driving mainly in the city or on long stretches of open roads and motorways? What's your typical weekly driving distance?

For short journeys, electric cars, plug-in hybrids or petrol cars are obvious choices. For longer daily commutes, a modern electric car is often suitable - especially if you can charge at home or at work. Diesel cars may still be relevant in some cases with very long journeys and lack of charging options. Remember that diesel engines with high emissions are prohibited from entering cities in various countries.

In which body styles can you buy the Mercedes SLK230?

On AutoUncle, the Mercedes SLK230 is exclusively offered in the cabriolet body style. A cabrio or a convertible is a fantastic way to give the driving experience a new dimension. These days, most cabrio models have excellent hoods and weather gear, making them suitable for driving year-round. It’s worth noting that convertibles tend to be heavier than normal cars due to the lack of roof, as thickener is applied underneath the car to strengthen the chassis.

What obvious alternatives can I consider for the Mercedes SLK230?

There are multiple similar cars to the Mercedes SLK230.

Recommended alternatives to the Mercedes SLK230

  • BMW 420
  • Audi TT
  • Mazda MX5

With a current inventory of 1,733 available models on AutoUncle, the BMW 420 stands out as the top alternative to the Mercedes SLK230. The BMW 420 comes with an average price of £17,750.

The Audi TT is a strong option in this segment, with 1,042 cars currently for sale on AutoUncle and an average price of £13,990. The Mazda MX5 comes in as the third most popular choice with an average sales price of £14,695 and 689 car for sale at the moment in the UK.

Considering the idea of going electric with your next car?

Considering something greener than the Mercedes SLK230? Check out these electric alternatives from the same segment::

Can't find an electric car that appeals to you? Check out our extensive selection of electric cars here.

All gear types for Mercedes SLK230