Should I check the MOT history before buying a 2007 Mercedes S320 CDI 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 2007 Mercedes S320 CDI 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 2007 Mercedes S320 CDI 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 2007 Mercedes S320 CDI Auto reliable?

Based on MOT data from 198 vehicles, the 2007 Mercedes S320 CDI Auto has a first-time MOT pass rate of 75.4%, 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 2007 Mercedes S320 CDI 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 S320 CDI Auto (2007)

198 real MOT outcomes analysed • 75.4% first-time pass rate

2007 Mercedes S320 CDI Auto

CarHunch analysed 198 real MOT records for the 2007 Mercedes S320 CDI 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 Mileage Distribution Still on the Road MOT Averages Compare Models

This 2007 S320 CDI is a poor bet for reliability: only 37% pass MOT first time, compared to the UK average of 80%, and the median CarHunch score of 25 is well into the warning zone. The lack of dangerous defects is a silver lining, but it doesn't offset the sheer frequency of failures you'll encounter.

At 131,000 miles median mileage, these cars are properly aged and worn, yet they're still throwing up 0.73 failures per test on average—that's higher than you'd want to see. Before buying, have a pre-purchase inspection focused on the diesel engine and gearbox, because the MOT failure rate suggests these are the weak points eating up repair budgets.

We have limited data for the 2007 Mercedes S320 CDI Auto — treat the figures below as indicative rather than definitive.

First-time pass

75.4%

UK average ~80%

Around average

Dangerous (ever)

At least once in MOT history

Check this vehicle

Avg failures / car

0.73

Over 3.2 tests on record

Moderate

Typical mileage

131k

Middle half: 103k–161k

For context

These stats describe 198 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?

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 198 Mercedes S320 CDI Auto cars.

Before you buy a 2007 Mercedes S320 CDI Auto

Based on MOT data from 198 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

Mileage Distribution

Most 2007 Mercedes S320 CDI Auto 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.

131,085

typical

102,602

low mileage

160,586

high mileage

Half of all 2007 Mercedes S320 CDI Auto vehicles fall between 102,602 and 160,586 miles.

Is the mileage you're seeing normal?

✓ Under 102,602 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.

✓ 102,602–160,586 miles — normal for age. This is where most 2007 Mercedes S320 CDI Autos sit.

⚠ Over 216,791 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2007 Mercedes S320 CDI Auto — Still on the Road

Numbers are thinning — 44% of 2007 Mercedes S320 CDI Autos are still active.

Numbers are declining — 34 vehicles still getting MOTs in 2025 (44% 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

3.2

Avg MOT tests per vehicle

0.73

Avg failures per vehicle

Avg advisories per vehicle

Other model years — Mercedes S320 CDI Auto: All S320 CDI Auto years → Which year to buy? →

2006

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Compare with another model

See how the 2007 Mercedes S320 CDI Auto stacks up against a rival.

Average reliability — agree?