Should I check the MOT history before buying a 2009 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 2009 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 2009 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 2009 Mercedes Benz Slk vehicles have had dangerous defects recorded?

40% 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 2009 Mercedes Benz Slk reliable?

Based on MOT data from 2,719 vehicles, the 2009 Mercedes Benz Slk has a first-time MOT pass rate of 82.2%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2009 Mercedes Benz Slk?

The most frequently recorded MOT issues on the 2009 Mercedes Benz Slk are: Offside Rear Tyre worn close to the legal limit (57.8% of vehicles), Nearside Rear Tyre worn close to the legal limit (57.5% of vehicles), Under-trays fitted obscuring some underside components (48.7% 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 2009 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 (2009)

2,719 real MOT outcomes analysed • 82.2% first-time pass rate

2009 Mercedes Benz Slk

CarHunch analysed 2,719 real MOT records for the 2009 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 2009 Mercedes-Benz SLK passes its MOT at 82.2%, slightly above the UK average of 80%, but this masks a serious concern: nearly 40% of these cars have recorded a dangerous defect at some point, which is well above acceptable levels and a genuine safety flag for buyers. That high dangerous defect rate suggests systemic issues beyond routine wear—likely suspension, braking, or steering problems that are characteristic of this generation.

At nearly 50,000 miles median, these SLKs are showing reasonable mileage for their age, but the 3.13 average failures and 18 advisories per vehicle tell you that maintenance becomes increasingly expensive once problems start. Before buying, get a pre-purchase inspection focused on the suspension and braking system, and factor in that this model will likely need more than cosmetic repairs as it ages.

The 2009 Mercedes Benz Slk has a decent first-time pass rate (82.2%), 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

82.2%

UK average ~80%

Around average

Dangerous (ever)

39.9%

At least once in MOT history

Check this vehicle

Avg failures / car

3.13

Over 16.3 tests on record

High

Typical mileage

47k

Middle half: 34k–61k

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 18 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 2,719 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 2,719 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 57.8%

Offside Rear Tyre worn close to the legal limit · Nearside Rear Tyre worn close to the legal limit · Nearside Rear Tyre worn close to legal limit/worn on edge · …

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

Other issues 48.7%

Under-trays fitted obscuring some underside components · Engine covers fitted obscuring some components in the engine bay

Brake wear 33.9%

Offside Rear Brake pipe corroded, covered in grease or other material · Nearside Rear Brake pipe corroded, covered in grease or other material · Offside Front Brake pipe corroded, covered in grease or other material

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

Suspension & steering 19.9%

Nearside Front Wheel bearing has slight play · Nearside Front Coil spring fractured or broken

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

Data covers a 3-year window centred on 2009.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 2,719 Mercedes Benz Slk cars.

Before you buy a 2009 Mercedes Benz Slk

Based on MOT data from 2,719 vehicles — here's what to check.

📋 Check the full MOT history. 39.9% 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%)	2,717	82.2%	3.13

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 2009 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.

47,456

typical

34,421

low mileage

61,159

high mileage

Half of all 2009 Mercedes Benz Slk vehicles fall between 34,421 and 61,159 miles.

Is the mileage you're seeing normal?

✓ Under 34,421 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.

✓ 34,421–61,159 miles — normal for age. This is where most 2009 Mercedes Benz Slks sit.

⚠ Over 82,564 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2009 Mercedes Benz Slk — Still on the Road

Almost all 2009 Mercedes Benz Slks are still on the road.

Strong survival — 2,330 vehicles still getting MOTs in 2025, 91% of the 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

16.3

Avg MOT tests per vehicle

3.13

Avg failures per vehicle

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 2009 Mercedes Benz Slk stacks up against a rival.

Watch for defects — worth knowing