2004 Mercedes-Benz CLK 2.6L Petrol · T7 BDB

The most recent MOT history for this 2004 Mercedes-Benz CLK reveals a concerning pattern of repeated failures despite no recorded defects on test dates. The vehicle failed in both June 2025 and December 2024, yet passed in November 2023, suggesting an underlying issue that evaded detection during those tests or was rectified inconsistently. The lack of specific defect codes in the failed entries complicates diagnosis, but the repeated failures imply a recurring problem—likely related to emissions, suspension alignment, or electrical systems—rather than a one-off oversight. The June 2025 pass followed a failure just twelve days prior, raising questions about whether the vehicle was adjusted between tests or if the issue resolved itself temporarily. Buyers should treat this as a red flag for either poor maintenance or a vehicle prone to intermittent faults. The mileage record shows a steady accumulation of approximately 6,233 miles annually, which aligns with typical usage for a vehicle of this age. Between November 2023 and June 2025, the odometer advanced by roughly 4,774 miles over 18 months, indicating consistent driving rather than prolonged neglect. However, the absence of intermediate MOTs—particularly between December 2024 and June 2025—suggests the vehicle may have been driven without regular checks during this period. The identical mileage at both the 2025 failure and pass (137,120) hints at either a test retake or a short period of minimal use before the final pass. While the mileage itself isn’t alarming, the lack of transparency in maintenance intervals warrants scrutiny. Given the repeated failures without defect details, a buyer should prioritise an independent inspection of the suspension components, particularly the bushes and coil springs, which often degrade over 22 years. The binding calipers or uneven brake wear mentioned in prior CLK models of this era could also resurface, so a thorough brake system check—including discs, pads, and hydraulic lines—is essential. Corrosion in wheel arches, subframes, or exhaust systems is another high-risk area for this age, and the lack of MOT advisories suggests these may have been overlooked. Electrical faults, such as faulty sensors or wiring looms, frequently cause intermittent failures in Mercedes vehicles, so a diagnostic scan for stored trouble codes is critical. The engine bay should be inspected for leaks, particularly around the oil cooler and power steering reservoir, as these are common failure points in this model.