Should I check the MOT history before buying a 2003 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 2003 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 2003 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 2003 Mercedes Benz Slk vehicles have had dangerous defects recorded?

37% 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 2003 Mercedes Benz Slk reliable?

Based on MOT data from 3,195 vehicles, the 2003 Mercedes Benz Slk has a first-time MOT pass rate of 78.4%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2003 Mercedes Benz Slk?

The most frequently recorded MOT issues on the 2003 Mercedes Benz Slk are: Nearside Rear Tyre worn close to the legal limit (90.5% of vehicles), Offside Rear Tyre worn close to the legal limit (86.6% of vehicles), Nearside Front Tyre worn close to the legal limit (56.5% 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 2003 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 (2003)

3,195 real MOT outcomes analysed • 78.4% first-time pass rate

2003 Mercedes Benz Slk

CarHunch analysed 3,195 real MOT records for the 2003 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 2003 Mercedes-Benz SLK passes its MOT just below the UK average at 78.4%, but the real concern is that 36.8% of these cars have recorded dangerous defects at some point—well above typical. This is a model where structural or safety issues are genuinely common, so a pre-purchase inspection by a specialist is not optional.

At 62,458 miles average, these cars are relatively low-mileage for their age, yet they're still averaging 4.73 failures per test and 26.8 advisories, suggesting age-related wear is hitting harder than mileage alone would predict. Before committing to one, have a Mercedes technician check the roof mechanism, electrical gremlins, and suspension components—this generation is prone to expensive problems that MOT failures will only begin to reveal.

The 2003 Mercedes Benz Slk has a decent first-time pass rate (78.4%), 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

78.4%

UK average ~80%

Around average

Dangerous (ever)

36.8%

At least once in MOT history

Check this vehicle

Avg failures / car

4.73

Over 21.1 tests on record

High

Typical mileage

60k

Middle half: 45k–77k

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 26.8 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 3,195 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 3,195 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 90.5%

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.

Other issues 40.4%

Oil leak, but not excessive · Under-trays fitted obscuring some underside components

Brake wear 35.7%

Front Brake pad(s) wearing thin · Rear Brake pad(s) wearing thin · Offside Rear 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 33.2%

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

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 2003.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 3,195 Mercedes Benz Slk cars.

Before you buy a 2003 Mercedes Benz Slk

Based on MOT data from 3,195 vehicles — here's what to check.

📋 Check the full MOT history. 36.8% 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%)	3,192	78.4%	4.73

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 2003 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.

60,473

typical

45,241

low mileage

77,173

high mileage

Half of all 2003 Mercedes Benz Slk vehicles fall between 45,241 and 77,173 miles.

Is the mileage you're seeing normal?

✓ Under 45,241 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.

✓ 45,241–77,173 miles — normal for age. This is where most 2003 Mercedes Benz Slks sit.

⚠ Over 104,183 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2003 Mercedes Benz Slk — Still on the Road

Numbers are thinning — 50% of 2003 Mercedes Benz Slks are still active.

1,448 vehicles still getting MOTs in 2025 — 50% of the peak remain.

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

21.1

Avg MOT tests per vehicle

4.73

Avg failures per vehicle

26.8

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 2003 Mercedes Benz Slk stacks up against a rival.

Watch for defects — worth knowing