2021 Mercedes-Benz CLA 1.3L Petrol · A15 XAU

The 2021 Mercedes-Benz CLA presents a mixed mechanical picture defined by a single serious failure in mid-2023 followed by four consecutive clean MOTs including the most recent 2026-06-24 pass. While the current test result confirms the vehicle is roadworthy with no active defects, the prior dangerous condition involving near-side front tyres worn within millimetres of the legal minimum serves as a critical warning sign that persisted until the next test. The absence of further failures since 2023 suggests the underlying issue was addressed before the last assessment, yet the 2023 failure warrants continued vigilance as the latest record does not supersede past conditions. This pattern indicates a vehicle that has experienced genuine deterioration requiring remediation rather than one that remains consistently pristine. At 61,992 recorded miles for a model year 2021 vehicle, the annual accumulation rate averages approximately 12,400 miles per year, which is substantially higher than typical usage expectations for such an age. The gap between the 2022 PASS and the 2023 FAIL represents a notable acceleration in wear that may correlate with the tyre failure period, suggesting accelerated degradation of suspension and related components under heavier-than-usual driving patterns or prolonged idling cycles. The subsequent clean tests from 2023 onwards indicate that the vehicle has stabilised, though the elevated mileage still implies significant fatigue in wearable systems that would normally require closer monitoring in lower-mileage equivalents. When conducting a test drive, the primary focus should remain on the front suspension system given the documented tyre condition from the 2023 failure. Inspect the near-side front tyre for asymmetric tread wear, soft or hard spots indicating worn bushings or damaged sidewalls, and verify that the wheel rotates freely without binding or excessive play at the hub. Listen for any knocking or clunking sounds over bumps, particularly noting whether the affected tyre exhibits a distinct vibration or handling irregularity that could signal a deeper structural issue in the suspension linkage or control arm assembly. Additionally, confirm that the brakes respond firmly throughout the pedal travel with no pulsation or spongy feel, as the high mileage profile may have subjected the braking system to increased thermal stress despite the recent clean MOT.