Mercedes Ml 320 CDI SE Auto (2006)
2006 Mercedes Ml 320 CDI SE Auto
CarHunch analysed 150 real MOT records for the 2006 Mercedes Ml 320 CDI SE Auto. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 2006 ML 320 CDI is a serious reliability gamble — only 25.2% pass the MOT first time, less than a third of the UK average of 80%. There are no dangerous defects on record, which is the one piece of good news, but that doesn't change the fact that three in four examples fail their test.
At 137,000 miles median, these are high-mileage vehicles, yet that doesn't fully explain why they're averaging 0.49 failures per test; older Mercedes SUVs with this engine are simply prone to expensive problems once they hit this age. Before buying, insist on a full specialist pre-purchase inspection focusing on the diesel engine and emissions system, as that's where the money will go.
What to check before buying a 2006 Mercedes Ml 320 CDI SE Auto
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Mercedes Ml 320 CDI SE Auto
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Mileage Distribution
Most 2006 Mercedes Ml 320 CDI SE Auto vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2006 Mercedes Ml 320 CDI SE Auto vehicles fall between 104,610 and 168,738 miles.
2006 Mercedes Ml 320 CDI SE Auto — Still on the Road
Numbers are declining — 14 vehicles still getting MOTs in 2024 (31% of peak).
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2017–2024.
MOT History Averages
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