2013 Mercedes-Benz CLS 2.1L Diesel · FL13 MFJ

The 2013 Mercedes-Benz CLS currently holds a valid MOT certificate following a pass on 11 March 2026 at 81,639 miles, yet the maintenance trend is highly irregular and warrants serious scrutiny. The vehicle has failed its MOT three times in the last two years—on 3 December 2024, 10 December 2025, and 10 March 2026—with zero defects recorded on each occasion. An MOT failure without recorded defects is an anomaly; it typically indicates the vehicle was presented in an untestable condition, such as severe fluid leaks, structural damage preventing ramp access, or an inability to start. Passing the very next day in March 2026 suggests a rapid, undocumented rectification occurred, but the repeated failures imply a pattern of neglect or a recurring underlying issue that the tester could not formally record. The mileage accumulation presents a distinct anomaly that contradicts the vehicle's recent usage. Between the failed test on 3 December 2024 at 75,014 miles and the failed test on 10 December 2025 at 81,600 miles, the CLS covered roughly 6,586 miles, aligning with typical annual usage. However, the odometer then advanced by only 39 miles over the subsequent three months, reaching 81,639 miles by the March 2026 tests. Such a drastic drop in usage following a period of regular driving suggests the vehicle may have been standing for extended periods, which can cause perishable component degradation, tyre flat-spotting, and brake disc corrosion. A prospective buyer must conduct a rigorous physical inspection, focusing heavily on the areas that likely caused the untestable failures. Inspect the underbody thoroughly for active fluid leaks from the engine, power steering, or air suspension systems, as these are common failure points on the CLS and would immediately halt an MOT test. Check the structural integrity of the sills, subframes, and suspension mounting points for corrosion, particularly given the likelihood of prolonged stationary periods. Examine the condition of the brake discs and calipers for surface rust and binding, and assess the tyres for cracking or flat-spotting. The discrepancy between the repeated untestable failures and the current clean bill of health demands a full diagnostic scan to uncover any stored fault codes that might explain the previous presentation issues.