2006 Mercedes-Benz CLS 3.0L Diesel · TE03 ANA

The Mercedes CLS has maintained a consistent pass rate across its last five MOT tests, with the most recent assessment on 2 October 2025 at 156,239 miles revealing only minor advisories—no major failures or dangerous defects. However, the trend suggests ongoing but low-priority maintenance neglect , particularly in corrosion-prone areas and suspension wear. The offside front brake pipe corrosion (first noted in October 2024 and persisting through October 2025 ) indicates a failure to address fluid leaks or environmental exposure, while the ball joint play (reported in October 2023 and again in October 2025 ) confirms gradual suspension degradation. These are not immediate safety risks but signal deferred attention to wear items. The absence of structural faults or severe brake system failures is positive, though the recurrence of advisories implies the vehicle has not been subjected to systematic checks beyond basic compliance. The mileage accumulation— 7,812 miles per year over 20 years—aligns with typical low-to-moderate usage for its age, with no sudden spikes or prolonged inactivity. The 11,659-mile gap between the 2022 and 2023 tests (from 144,280 to 150,948 miles ) suggests either a delayed test or a period of reduced use, but the steady progression thereafter avoids red flags. The lack of defects in 2021 and 2022 contrasts with the later advisories, hinting that issues may have emerged post- September 2022 —possibly due to changes in storage conditions, driving habits, or owner oversight. For a buyer, the brake system demands closest scrutiny, particularly the offside front brake pipe , which has shown persistent corrosion despite repeated MOT passes. This could mask underlying fluid loss or caliper binding, warranting a fluid level check and visual inspection for leaks or seized components. The suspension ball joint play —now affecting both front corners—should be tested dynamically; excessive movement could lead to uneven tyre wear or steering instability. Tyre condition, while not a failure, remains a weak point: the rear inner tyres have been flagged twice for near-legal tread, suggesting basic upkeep was skipped. Finally, the headlamp lens contamination is trivial but reflects a lack of cosmetic maintenance, which may extend to other areas. The vehicle’s structural integrity appears sound , with no signs of corrosion in critical zones or frame damage. However, the recurring advisories on corrosion and suspension imply a history of reactive rather than preventive maintenance. A pre-purchase inspection should verify whether these issues have been professionally addressed since the last MOT, as the current owner may have prioritised passing the test over resolving underlying problems.