2020 Mercedes-Benz CLA 1.3L Petrol · AV20 YKA

The most recent MOT test on the 2020 Mercedes-Benz CLA, conducted just two days ago, resulted in a clean pass with no recorded defects. However, the vehicle’s MOT history reveals a pattern of recurring advisories and one major failure that suggests underlying wear issues requiring attention. The 2025 October test showed rear brake pads nearing their limit, while the same test also marked the first failure with critical tyre damage—offside rear and front tyres exhibiting cuts deep enough to expose the ply, alongside nearside rear tyre damage and nearside front tyre wear close to legal limits. These failures indicate a history of significant tyre and brake system wear, likely accelerated by either aggressive driving, poor maintenance, or prolonged standing in a stationary position, which can exacerbate brake pad and disc corrosion or binding. The 2024 July tests, though passing, included persistent advisories about brake disc wear and minor tyre cuts, reinforcing the need for closer inspection of braking components and tyre condition. The vehicle’s recorded mileage of 71,747 miles over approximately six years represents an average of around 11,958 miles annually, which is consistent with typical usage for a six-year-old car. However, the MOT history suggests periods of either lighter use or prolonged inactivity, as the vehicle failed in October 2025 with no intervening MOT between that and the July 2024 test—approximately nine months apart. Prolonged standing can lead to brake caliper binding, where the pads may not retract fully, causing uneven wear on discs and pads, as well as potential corrosion on brake lines or calipers. Additionally, stationary vehicles can suffer from tyre perishing, particularly if exposed to harsh weather or lack of rotation, leading to sidewall cracking or dry rot. The rapid accumulation of mileage in the final years of the six-year period may also imply higher-than-average usage, which could accelerate wear on suspension components, drivetrain elements, and fluid degradation. Given the recurring advisories and tyre failure history, the prospective buyer should conduct a thorough mechanical inspection before purchase. Focus on the braking system first: check for uneven brake pad wear, binding calipers, or corrosion on brake discs and lines, which may explain the repeated advisories nearing the limit. Listen for abnormal brake noise or shuddering during acceleration or braking, and inspect for disc warping or glazing. The tyres should be rotated to ensure even wear, and any remaining cuts or smooth edges should be measured against legal limits. The offside rear tyre failure highlights the importance of verifying tyre tread depth and condition, as well as checking for signs of excessive heat damage or internal cord exposure. Additionally, inspect the suspension for signs of worn bushes, coil spring failure, or excessive play in the struts, as these can contribute to the tyre damage observed in the MOT failures. For fluid servicing, given the vehicle’s age and usage profile, the buyer should verify the condition of the engine oil, coolant, and brake fluid, as these can degrade over time, especially if the car has been stationary for extended periods. Check for leaks around the oil pan, coolant hoses, and brake master cylinder, and inspect the coolant level and condition for signs of contamination or sludge. The 12V battery should be tested for voltage and charge capacity, as standing vehicles can suffer from sulfation or weak alternator performance. Finally, a visual inspection of the exhaust system for corrosion, leaks, or structural integrity is prudent, particularly given the potential for prolonged stationary use. If the vehicle has a service history, verify that the manufacturer-recommended intervals for fluid changes and component replacements have been adhered to, as the MOT failures suggest some components may have been neglected. A professional pre-purchase inspection by a qualified mechanic would be advisable to confirm the absence of hidden issues, such as drivetrain wear, electrical faults, or structural concerns.