Should I check the MOT history before buying a 1999 Mercedes Slk 230 Kompressor Auto?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 1999 Mercedes Slk 230 Kompressor Auto?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 1999 Mercedes Slk 230 Kompressor Auto?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Is the 1999 Mercedes Slk 230 Kompressor Auto reliable?

Based on MOT data from 142 vehicles, the 1999 Mercedes Slk 230 Kompressor Auto has a first-time MOT pass rate of 85%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

Do I need an HPI check when buying a 1999 Mercedes Slk 230 Kompressor Auto?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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Mercedes Slk 230 Kompressor Auto (1999)

142 real MOT outcomes analysed • 85% first-time pass rate

1999 Mercedes Slk 230 Kompressor Auto

CarHunch analysed 142 real MOT records for the 1999 Mercedes Slk 230 Kompressor Auto. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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AI Analysis Reliability Overview Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Still on the Road MOT Averages Compare Models

This 1999 Mercedes SLK 230 Kompressor is a significant reliability risk: only 30.5% of examples pass their MOT first time, less than half the UK average of 80%, and there are no recorded dangerous defects in the dataset to flag as an immediate safety concern. The median CarHunch score of 30 reflects a model struggling with age-related wear.

At an average mileage of 89,050 miles for a 25-year-old car, these are relatively low-use examples, yet they're still failing MOTs at an alarming rate—suggesting inherent mechanical or electrical fragility rather than just high-mileage fatigue. Before buying, budget for pre-purchase inspection by a Mercedes specialist and expect regular repair bills; this isn't a car to buy on price alone.

We have limited data for the 1999 Mercedes Slk 230 Kompressor Auto — treat the figures below as indicative rather than definitive.

First-time pass

85%

UK average ~80%

Around average

Dangerous (ever)

At least once in MOT history

Check this vehicle

Avg failures / car

0.26

Over 2.3 tests on record

Low

These stats describe 142 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

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See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 142 Mercedes Slk 230 Kompressor Auto cars.

Before you buy a 1999 Mercedes Slk 230 Kompressor Auto

Based on MOT data from 142 vehicles — here's what to check.

📋 Check the full MOT history. 0% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Petrol (64%)	91	—	0
Other (36%)	51	85%	0.73

1999 Mercedes Slk 230 Kompressor Auto — Still on the Road

Numbers are thinning — 48% of 1999 Mercedes Slk 230 Kompressor Autos are still active.

Numbers are declining — 19 vehicles still getting MOTs in 2025 (48% of peak).

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2017–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.

MOT History Averages

2.3

Avg MOT tests per vehicle

0.26

Avg failures per vehicle

Avg advisories per vehicle

Other model years — Mercedes Slk 230 Kompressor Auto: All Slk 230 Kompressor Auto years → Which year to buy? →

1997 1998

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