2015 Mercedes-Benz CLA 2.1L Diesel · M23 KAE

A clear pattern of rear-end consumable wear runs through the MOT history of this CLA, with no other significant structural or mechanical defects recorded. Across six test events from 2019 to 2025, the vehicle has passed on five occasions and recorded only one failure, which was a minor washer fluid issue in October 2020. The recurring advisories, however, paint a consistent picture of wear at the rear axle: rear brake disc surface degradation was flagged in 2020, followed by both rear tyres wearing close to the legal limit on inner and outer edges in 2023. The most recent assessment on 11 November 2025 returned a clean pass with no advisories, indicating that while the rear axle has historically demanded attention, nothing is currently flagged as failing or approaching failure. With 78,738 miles recorded over an eleven-year life, the vehicle averages roughly 7,158 miles annually, which sits broadly in line with typical usage for a car of this age. The mileage progression between tests is steady rather than erratic, suggesting the vehicle has remained in regular use rather than experiencing long stationary periods that can lead to brake seizure, fluid degradation, or corrosion of underbody components. No gaps in annual testing are present, which is a positive indicator for continuity of mechanical observation. The cumulative mileage remains moderate, meaning major drivetrain items such as the timing chain, dual-clutch transmission mechatronics, and turbocharger have not yet reached the high-mileage thresholds where significant interventions are commonly required on this model, though clutch and DMF condition should still be verified. From a buyer inspection perspective, the historical advisories warrant focused attention during any physical examination and test drive. Given the repeated rear brake disc pitting and scoring notes from 2020, the rear caliper slides and guide pins should be inspected for seizure or restricted travel, as sticking calipers commonly cause uneven pad transfer and accelerated disc wear on Mercedes vehicles of this generation. On a test drive, listen for any dragging sensation from the rear brakes during low-speed coasting, check for a pulling pull under braking, and feel for judder through the pedal that could indicate disc runout or hot spots developing on the rear axle. The 2023 advisory regarding rear tyres worn on both inner and outer edges warrants checking the rear wheel geometry, as simultaneous inner-and-outer edge wear is frequently symptomatic of incorrect camber rather than simple inflation issues. The 2019 advisory for front brake pads wearing thin should prompt a current inspection of pad thickness and disc condition at the front axle, with particular attention to any lip on the disc outer edge that could indicate the discs themselves are nearing replacement. Although the most recent test was clean, the brake lines, flexible hoses, and handbrake mechanism should be examined for corrosion, particularly around the rear axle where road salt exposure is highest. During a road test, pay close attention to steering response over uneven surfaces for any clonks or knocks that might indicate worn suspension linkages, and check for vibration through the steering wheel at motorway speeds that could point to balancing or front brake disc issues. Given the vehicle's history of rear-focused wear, a thorough inspection of the rear suspension bushes and subframe mounting points for any surface corrosion is also advisable before purchase.