2006 Mercedes-Benz CLS 3.5L Petrol · CE56 DKK

The most recent MOT history reveals a concerning pattern of instability, particularly in the final test cycle. The vehicle failed on 2025-10-07 at 62,362 miles before passing the subsequent test just one day later at the same mileage, with no recorded defects. This abrupt reversal suggests either a last-minute correction of an undocumented issue or a procedural anomaly, but it underscores a lack of consistency in roadworthiness. The preceding tests in 2024 and 2023 were clean, with no advisories or defects, yet the repeated failure in October 2023—followed by an immediate pass—implies a potential oversight or rushed inspection. While the vehicle technically passed its most recent test, the irregularity warrants scrutiny of whether critical components were overlooked or hastily addressed. The mileage progression of approximately 3,118 miles per year is unusually low for a vehicle of this age, suggesting prolonged periods of inactivity or limited use. Between the 2023 and 2024 tests, the vehicle accumulated just 5,479 miles over 12 months, a rate that could accelerate corrosion in exposed metalwork, particularly in the underbody, suspension mounts, and wheel arches. The identical mileage for the failed and passed tests in October 2023 further raises suspicion—either the vehicle was stationary for an extended period before the retest, or the failure was tied to a non-mileage-dependent issue like battery failure or sensor malfunctions. Buyers should verify whether the low mileage aligns with service records, as prolonged storage can exacerbate wear on fluids, seals, and electrical systems. Given the lack of specific defect details in the MOT history, a buyer should prioritise an independent inspection of high-wear areas that often fail without clear warning. The repeated failures in October 2023—despite no recorded issues—suggest a history of either inconsistent maintenance or undocumented problems. Focus on the suspension system, particularly coil springs, bushes, and shock absorbers, as these components degrade gradually and may not always trigger MOT advisories until failure. Brake systems, including calipers, pads, and discs, should be checked for uneven wear or binding, especially if the vehicle was stationary for extended periods. Additionally, inspect the underbody for corrosion, particularly around the sills, subframe, and exhaust system, as low mileage combined with age increases the risk of structural compromise. Electrical components, such as the battery, alternator, and sensors, should also be tested, as intermittent failures can mimic undiagnosed mechanical issues.