2009 Mercedes-Benz CLK 1.8L Petrol · B7 UNM

The vehicle’s most recent MOT history, spanning just over a year, reveals a concerning instability in roadworthiness despite no recorded defects on either test. The back-to-back failure and pass in December 2025—both at identical mileage—suggests either a narrowly missed advisory or a test centre discrepancy, though the absence of defect codes makes it impossible to pinpoint the exact issue. The preceding tests in late 2024 and 2023 show no failures, indicating a stable pattern until the recent anomaly. Without specific advisory details, the buyer must treat this as a red flag, as repeated near-misses on the same vehicle imply either inconsistent testing or unresolved underlying issues that could recur. The recorded mileage of 81,455 miles over nearly 17 years—roughly 4,800 miles annually—is unusually low for a vehicle of this age, suggesting it has spent extended periods off the road or was used sparingly. The gap between the 2023 and 2024 tests (around 6,000 miles in a year) is similarly modest, with no evidence of aggressive driving or heavy usage. While low mileage can reduce wear on high-stress components like suspension bushes or brake calipers, it also raises questions about storage conditions, which may have accelerated corrosion or fluid degradation. The lack of mileage spikes between tests makes it difficult to assess whether critical components—such as coil springs, subframe mounts, or exhaust systems—have been subjected to prolonged static loads or environmental exposure. Given the absence of defect codes in the MOT history, the buyer’s primary focus should be on areas commonly overlooked in low-mileage vehicles: structural integrity and hidden corrosion. The 2009 CLK’s underbody, wheel arches, and suspension mounts are particularly vulnerable to rust, even with minimal driving. Inspect the subframe, sills, and rear axle for pitting or section loss, as these areas often degrade silently over time. The rear brakes, which may have been flagged in the 2025 near-failure, warrant close examination for binding calipers or uneven wear—especially if the vehicle has been stationary for prolonged periods. Additionally, check for fluid leaks around the power steering, differential, or transmission, as these can develop without mileage-related stress. The lack of advisories in prior tests does not guarantee absence of these issues, but a thorough mechanical inspection will reveal whether the vehicle has been properly maintained or neglected in storage.