Should I check the MOT history before buying a 1999 Mercedes Benz Slk?

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 Benz Slk?

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 Benz Slk?

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.

How many 1999 Mercedes Benz Slk vehicles have had dangerous defects recorded?

28% of these vehicles have had a dangerous defect recorded. Search the registration on CarHunch — the full MOT history will show exactly what was flagged and whether it was resolved.

Is the 1999 Mercedes Benz Slk reliable?

Based on MOT data from 4,139 vehicles, the 1999 Mercedes Benz Slk has a first-time MOT pass rate of 77.8%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 1999 Mercedes Benz Slk?

The most frequently recorded MOT issues on the 1999 Mercedes Benz Slk are: Nearside Rear Tyre worn close to the legal limit (83.6% of vehicles), Offside Rear Tyre worn close to the legal limit (80% of vehicles), Nearside Front Tyre worn close to the legal limit (57.4% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

Do I need an HPI check when buying a 1999 Mercedes Benz Slk?

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 Benz Slk (1999)

4,139 real MOT outcomes analysed • 77.8% first-time pass rate

1999 Mercedes Benz Slk

CarHunch analysed 4,139 real MOT records for the 1999 Mercedes Benz Slk. 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 Common Issues Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

The 1999 Mercedes-Benz SLK has a first-time pass rate of 77.8%, slightly below the UK average of 80%, which suggests modest reliability concerns for a car of this age. More worryingly, 28.4% of these vehicles have recorded a dangerous defect at some point, well above the threshold where a buyer should proceed with serious caution and a pre-purchase inspection.

At around 75,500 miles median, these cars are running relatively low mileage for their age, yet they're still averaging 4.3 failures and 26.2 advisories per test—a sign that age and wear are catching up regardless. Before buying, insist on a full pre-purchase inspection focusing on suspension, electrical systems, and the soft-top mechanism, as the advisory count suggests accumulated wear in precisely the areas that make this model expensive to repair.

The 1999 Mercedes Benz Slk has a decent first-time pass rate (77.8%), but a higher-than-average share of vehicles have had serious defects recorded — the individual vehicle's history matters a lot here.

⚠️ Over 1 in 5 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

77.8%

UK average ~80%

Around average

Dangerous (ever)

28.4%

At least once in MOT history

Check this vehicle

Avg failures / car

4.3

Over 18.6 tests on record

High

Typical mileage

76k

Middle half: 56k–94k

For context

🔧 Average reliability. Passes at roughly the UK rate — not a standout, not a problem vehicle. Individual history makes all the difference.

🔧 Expect consumable spend. An average of 26.2 advisories per vehicle tells you wear items (tyres, brakes) get flagged regularly. Budget for them — they're not surprises.

🔍 The dangerous defect figure is real. Most are one-off tyre failures or brake issues — not structural problems. But it's exactly why checking the individual vehicle's history is essential, not optional.

These stats describe 4,139 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.

Watch for defects — worth knowing

What tends to go wrong

Across 4,139 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 83.6%

Nearside Rear Tyre worn close to the legal limit · Offside Rear Tyre worn close to the legal limit · Nearside Front Tyre worn close to the legal limit · …

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Suspension & steering 37.9%

Nearside Front wheel bearing has slight play · Offside Front wheel bearing has slight play · Offside Front Wheel bearing has slight play · …

Harder to spot without a ramp — this is a good reason to book a pre-purchase inspection.

Brake wear 35.5%

Front Brake pad(s) wearing thin · Nearside Rear Brake pipe slightly corroded · Offside Rear Brake pipe slightly corroded · …

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Other issues 24%

Under-trays fitted obscuring some underside components · Windscreen has damage to an area less than a 40mm circle outside zone 'A'

Data covers a 3-year window centred on 1999.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 4,139 Mercedes Benz Slk cars.

Before you buy a 1999 Mercedes Benz Slk

Based on MOT data from 4,139 vehicles — here's what to check.

📋 Check the full MOT history. 28.4% 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 (100%)	4,137	77.8%	4.3

Colour Breakdown

Based on 79,588 Mercedes Benz Slk vehicles registered in the UK — across all years. From DVLA registration records.

Silver 41.3%

32,850

Black 25%

19,862

Blue 11.5%

9,149

White 8.4%

6,655

Red 7.6%

6,078

Grey 4.3%

3,444

Green 1%

796

Yellow 0.6%

510

Orange 0.1%

Beige 0.1%

Purple 0.1%

Gold 0.1%

Mileage Distribution

Most 1999 Mercedes Benz Slk vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

75,518

typical

56,187

low mileage

94,073

high mileage

Half of all 1999 Mercedes Benz Slk vehicles fall between 56,187 and 94,073 miles.

Is the mileage you're seeing normal?

✓ Under 56,187 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 56,187–94,073 miles — normal for age. This is where most 1999 Mercedes Benz Slks sit.

⚠ Over 126,998 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

1999 Mercedes Benz Slk — Still on the Road

Numbers are thinning — 34% of 1999 Mercedes Benz Slks are still active.

Numbers are declining — 1,161 vehicles still getting MOTs in 2025 (34% of peak).

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
* 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

18.6

Avg MOT tests per vehicle

4.3

Avg failures per vehicle

26.2

Avg advisories per vehicle

Other model years — Mercedes Benz Slk: All Slk years → Which year to buy? →

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Compare with another model

See how the 1999 Mercedes Benz Slk stacks up against a rival.

Watch for defects — worth knowing