Model Reports 8 min read Updated 12 Jul 2026

Mercedes-Benz Ml 2006: reliability & common MOT faults

Elevated MOT failure patterns for the 2006 Mercedes-Benz Ml include Steering rack (front) (~9.6× peers) and Pre 01/07/2008 Turbo (~3.8× peers). Based on UK DVSA open data for test year 2025 (428 failed first-attempt tests), compared with similar age and mileage peers. Available test years: 2024, 2025.

428 failed first-attempt tests · 1,315 first tests (test year 2025)

Standout pattern: Steering rack (front) — about 9.6× more often than on similar peer cars.

Key takeaways before you buy

  • Steering rack (front): about 9.6× more often than similar cars
  • Pre 01/07/2008 Turbo: about 3.8× more often than similar cars
  • Flexible brake hoses (front): about 3.2× more often than similar cars

Common faults

These are MOT failure patterns that show up more often on this registration year than on similar cars of the same class, age band, and mileage in the same test year (leave-one-out peer comparison; whole model family excluded).

Statistical patterns from MOT defect codes — not manufacturer TSBs, recalls, or a diagnosis of any individual car. Fail and advisory patterns are kept separate.

Based on 428 failed first-attempt tests in test year 2025.

Steering rack (front)

This failure pattern appears about 9.6× more often than on similar peer cars — recorded on 28 failed first-attempt tests; 6.5% of failed tests for this model year.

Front · 28 failures · ×9.6 vs similar cars · 6.5% of failed first tests · Possible elevated fault

Pre 01/07/2008 Turbo

This failure pattern appears about 3.8× more often than on similar peer cars — recorded on 35 failed first-attempt tests; 8.2% of failed tests for this model year.

Any · 35 failures · ×3.8 vs similar cars · 8.2% of failed first tests · Likely common fault pattern

No patterns met the strongest callout thresholds on this page; showing the highest-lift rows that still cleared the display floors.

# Fault pattern Location Failures vs similar cars Share of fails Confidence
1 Steering rack (front)
Steering > Steering gear > Steering rack
 Front 28 ×9.6 6.5% Possible elevated fault
2 Pre 01/07/2008 Turbo
Noise, emissions and leaks > Exhaust emissions > Compression ignition > Pre 01/07/2008 Turbo
 Any 35 ×3.8 8.2% Likely common fault pattern
3 Flexible brake hoses (front)
Brakes > Flexible brake hoses
 Front 21 ×3.2 4.9% Possible elevated fault
4 Coil spring (rear)
Suspension > Springs > Coil springs > Coil spring
 Rear 37 ×2.7 8.6% Possible elevated fault
5 Individual direction indicators (rear)
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Individual direction indicators
 Rear 25 ×2.6 5.8% Possible elevated fault

Only patterns that clear minimum sample and elevation thresholds are shown (at least 20 failures and 2.0× peer lift).

Advisories

Advisory items recorded on failed first-attempt tests that appear elevated versus peers. Advisories are not a fail rate — they flag issues noted at the test, often before they become failures.

# Advisory pattern Location Notes vs similar cars Share Confidence
1 Rigid brake pipes (front)
Brakes > Rigid brake pipes
 Front 62 ×2.6 14.5% Elevated vs peers
2 Engine oil leaks (front)
Noise, emissions and leaks > Fluid leaks > Engine oil leaks
 Front 24 ×2.2 5.6% Elevated vs peers

FAQs

We do not show a single reliability score for the 2006 Mercedes-Benz Ml on this page. Among 428 failed first-attempt MOT tests (test year 2025), Steering rack (front) appears more often than on similar peer cars (about 9.6× more often than peers; 28 observed failures; 6.5% of failed tests). Treat this as a pre-purchase checklist from DVSA open data — not a guarantee for any individual car.
Among failed first-attempt tests we surface patterns that appear more often than on similar peer cars. Top example: Steering rack (front) (about 9.6× more often than peers; 28 observed failures; 6.5% of failed tests). These are statistical signals, not a diagnosis of any individual car.
Steering rack (front) shows up more often than on similar peer cars (about 9.6× more often than peers; 28 observed failures; 6.5% of failed tests). That does not prove a causal design fault — age, mileage, and usage still matter. Treat it as a pre-purchase check point, not a manufacturer TSB.
Common MOT problem areas for the 2006 Mercedes-Benz Ml include Steering rack (front), Pre 01/07/2008 Turbo, Flexible brake hoses (front). These are elevated versus similar peer cars where lift clears our floors — not a full list of every possible fault on an individual car.
Advisories flag issues noted at the test and are not a fail rate. We show advisory patterns that look elevated versus peers among failed first-attempt tests, separate from common failure rows. Use them as early-warning checks, not as a pass/fail score.
This page highlights elevated MOT failure patterns for the 2006 Mercedes-Benz Ml (registration year) using UK DVSA open data for the selected test year. Patterns are ranked against similar age and mileage peers. It is a buyer checklist from MOT defect statistics — not a full service history or manufacturer TSB list.
No. MOT tests do not cover engine internals, gearboxes, or many electronic modules. Patterns here come from MOT defect statistics only and should not be read as engine or gearbox reliability scores.
PRS means the vehicle failed items that were fixed at the test station and then passed the same day. We count PRS as a first-attempt fail in headline rates so same-day repairs do not hide problems.

About this data

Universe. UK class 4 cars only; normal MOT tests (not retests); results pass, PRS, or fail; one first test per vehicle per calendar year.

PRS policy. PRS means the vehicle failed items that were fixed at the test station and then passed the same day. We count PRS as a first-attempt fail in headline rates so same-day repairs do not hide problems.

Peer baseline. We compare this model year with other class 4 cars of similar age and mileage in the same test year, excluding the whole model family so the car is not compared with itself (leave-one-out peer baseline).

Data years. Test years covered: 2024, 2025.

Limitations.

  • MOT tests do not cover engine internals, gearboxes, or many electronic modules — so this is not a full reliability score.
  • Common faults are inferred from MOT defect statistics, not manufacturer TSBs or recalls.
  • Matching on age and mileage reduces but does not remove every usage or maintenance difference between cars.
  • Pass rates and star scores appear only when those data marts are available; this page never invents them.

Display rules config: 1

Contains public sector information licensed under the Open Government Licence v3.0.

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