Should I check the MOT history before buying a 2018 Mercedes Benz Slc?

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 2018 Mercedes Benz Slc?

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 2018 Mercedes Benz Slc?

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 2018 Mercedes Benz Slc reliable?

Based on MOT data from 1,505 vehicles, the 2018 Mercedes Benz Slc has a first-time MOT pass rate of 92.2%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2018 Mercedes Benz Slc?

The most frequently recorded MOT issues on the 2018 Mercedes Benz Slc are: Nearside Rear Tyre worn close to legal limit/worn on edge (31.8% of vehicles), Offside Rear Tyre worn close to legal limit/worn on edge (30.4% of vehicles), Offside Front Tyre slightly damaged/cracking or perishing (19.7% 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 2018 Mercedes Benz Slc?

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 Slc (2018)

1,505 real MOT outcomes analysed • 92.2% first-time pass rate

2018 Mercedes Benz Slc

CarHunch analysed 1,505 real MOT records for the 2018 Mercedes Benz Slc. 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 2018 Mercedes-Benz SLC is a genuinely reliable car by UK standards, with a 92.2% first-time MOT pass rate that sits well above the 80% national average. Petrol variants perform slightly better at 92.6% versus 88.6% for diesel, and the 17.5% rate of dangerous defects is acceptable rather than a red flag.

These cars are running low mileage for their age—a median of just 21,033 miles suggests careful ownership—which explains why they average only 0.52 failures per vehicle. The 3.6 advisories per test point to minor wear items rather than structural problems, so if you're buying one, prioritise a pre-purchase inspection focused on the history of any advisory work to avoid inheriting deferred maintenance costs.

The 2018 Mercedes Benz Slc passes its MOT first time at roughly the UK average rate (92.2%) — solid but worth checking this vehicle's history carefully.

⚠️ Around 1 in 8 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

92.2%

UK average ~80%

Better than average

Dangerous (ever)

17.5%

At least once in MOT history

Check this vehicle

Avg failures / car

0.52

Over 5.6 tests on record

Moderate

Typical mileage

21k

Middle half: 14k–29k

For context

✅ Good baseline reliability. A 92.2% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

🔧 Expect consumable spend. An average of 3.6 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 1,505 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.

Average reliability — agree?

What tends to go wrong

Across 1,505 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 31.8%

Nearside Rear Tyre worn close to legal limit/worn on edge · Offside Rear Tyre worn close to legal limit/worn on edge · Offside Front Tyre slightly damaged/cracking or perishing · …

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

Other issues 15.2%

COVID-19 6 MONTH EXTENSION · Windscreen damaged but not adversely affecting driver's view

Suspension & steering 10%

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.

Lighting 6.5%

Nearside Front Road wheel slightly distorted

Usually cheap to fix. Worth confirming all lights work before collecting.

Data covers a 3-year window centred on 2018.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 1,505 Mercedes Benz Slc cars.

Before you buy a 2018 Mercedes Benz Slc

Based on MOT data from 1,505 vehicles — here's what to check.

📋 Check the full MOT history. 17.5% 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 (89%)	1,332	92.6%	0.49
Diesel (11%)	173	88.6%	0.76

Colour Breakdown

Based on 8,456 Mercedes Benz Slc vehicles registered in the UK — across all years. From DVLA registration records.

Black 31.4%

2,658

White 20.7%

1,753

Grey 16.8%

1,419

Blue 13.6%

1,147

Silver 11.4%

961

Red 6%

511

Yellow 0.1%

Mileage Distribution

Most 2018 Mercedes Benz Slc 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.

21,033

typical

14,040

low mileage

29,319

high mileage

Half of all 2018 Mercedes Benz Slc vehicles fall between 14,040 and 29,319 miles.

Is the mileage you're seeing normal?

✓ Under 14,040 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.

✓ 14,040–29,319 miles — normal for age. This is where most 2018 Mercedes Benz Slcs sit.

⚠ Over 39,580 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2018 Mercedes Benz Slc — Still on the Road

Almost all 2018 Mercedes Benz Slcs are still on the road.

Strong survival — 1,438 vehicles still getting MOTs in 2025, 98% of the peak.

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2021–2025.

MOT History Averages

5.6

Avg MOT tests per vehicle

0.52

Avg failures per vehicle

3.6

Avg advisories per vehicle

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

2016 2017 2019

Or browse all models: Mercedes Benz →

Compare with another model

See how the 2018 Mercedes Benz Slc stacks up against a rival.

Average reliability — agree?