2014 MERCEDES-BENZ CLS3.0L Diesel

The Mercedes-Benz CLS presents a mixed but ultimately concerning maintenance history, with the most recent MOT tests revealing a pattern of repeated failures without recorded defects. The September 2025 test at 119,451 miles passed cleanly, yet just three weeks earlier, the vehicle failed on the same mileage—an anomaly given the absence of documented issues. This inconsistency suggests either a clerical error or a deliberate circumvention of testing protocols, neither of which inspires confidence. The prior failures in June 2023 and August 2025, both at identical mileages (101,220 and 119,442 respectively), further imply either intermittent test failures or a vehicle that narrowly avoids major defects. Without specific advisories or defects, the record offers little technical insight, but the repeated failures raise questions about whether the car has been driven to pass tests or if underlying issues persist undetected. The mileage accumulation of 9,954 miles per year aligns with typical usage for a 12-year-old vehicle, though the clustering of tests—particularly the back-to-back failures in 2025—stands out. The gap between the 2024 test (110,991 miles) and the 2023 failures (101,220 miles) suggests the car was either stored or driven sparingly for nearly a year, yet the rapid mileage increase in the following 12 months (8,460 miles) contradicts that. This inconsistency, combined with the lack of documented defects, makes it difficult to assess whether the vehicle has been well-maintained or simply driven to avoid major issues. The absence of advisories in any test further obscures routine maintenance patterns, leaving a buyer to question whether critical components have been neglected. Given the sparse MOT record, a prospective buyer should prioritise an independent inspection of structural integrity, suspension components, and braking systems. The repeated failures without explanation could mask binding calipers, worn suspension bushes, or corrosion in critical areas such as the subframe or rear trailing arms. Particular attention should be paid to the rear brakes, given their tendency to cause test failures in other Mercedes models of this era, as well as the condition of coil springs and anti-roll bar bushes, which often degrade without leaving a trace in MOT history. The lack of advisories on exhaust emissions or tyre condition also warrants scrutiny, as these are common areas where owners may defer maintenance. Without a full service history, the vehicle’s true mechanical state remains uncertain, making due diligence essential.