2009 Mercedes-Benz A-Class 1.7L Petrol · C7 SAG

The most recent DVSA examination on 12 November 2025 produced a PASS, but only after a prior failed attempt on the same date, indicating the vehicle required remedial work to clear the test. The failure was due to a non-functioning nearside side repeater, classed as a Major defect, which is a minor lamp unit repair rather than a structural concern. The advisory recorded alongside both the pass and fail notices concerns a rear brake disc that is worn, pitted, or scored but not seriously weakened, suggesting surface corrosion or light wear consistent with the disc material being within safe service limits but approaching the point at which replacement may become necessary. Looking at the broader MOT trend, the previous year (2024) also shows a fail-to-pass sequence involving a leaking front shock absorber and an incorrect headlamp aim, while the 2023 test flagged advisories on both front tyres and noted light oil misting on an offside front shock absorber. The maintenance trend appears broadly stable but with recurring niggling issues around suspension sealing, lighting, and braking components, all typical of a vehicle entering its late teens. With 94,381 miles recorded over approximately seventeen years, the average annual mileage is around 5,552 miles, which is considerably below the national average and consistent with light, predominantly urban or short-journey use, or alternatively with extended periods of standing. Such low-mileage use can be as demanding on certain components as higher mileage, particularly where the vehicle is not used daily, as short trips prevent the engine, exhaust, and catalytic converter from reaching full operating temperature, leading to moisture accumulation, oil dilution, and accelerated corrosion of underbody and exhaust components. The annual consistency of the test cycle (each test falling within a few days of mid-November) suggests a regular habit of biennial testing, but the relatively modest mileage accumulation between tests indicates the vehicle has likely been used gently, possibly stored for periods, which warrants particular attention to age-related deterioration rather than wear-related concerns. Given the recurring advisories on the front shock absorbers, with light oil misting noted in 2023 and a serious fluid leak recorded as a Major failure in 2024, a prospective buyer should pay close attention to the suspension condition. On a test drive, listen for clonks or knocks over bumps, observe whether the vehicle sits level or shows a slight sag at either front corner, and check for any residual oil residue on the exposed shock body or coil spring. The 2024 leak was on the offside front, so pay particular attention to the nearside unit now, as shock absorbers typically fail in matched pairs given similar age and load exposure. Additionally, the 2025 advisory on the rear brake disc suggests it should be physically inspected for lip corrosion, surface pitting depth, and whether the caliper is binding, which can be checked by observing whether the rear wheels run hot after a short drive or by feel at the centre of the disc after use. Uneven tyre wear, brake shudder through the steering wheel under firm pedal application, or a spongy brake pedal would all warrant further investigation. Beyond the recorded advisories, a vehicle of this age and low usage profile demands several age-related inspections that MOT testing does not fully cover. Tyre sidewalls should be examined closely for perishing, cracking, and UV degradation, as the 2023 advisories on the front tyres for cracking and perishing indicate the rubber compounds are reaching the end of their safe service life regardless of tread depth, and replacement of all four tyres should be anticipated. The 12V battery should be load-tested, as batteries that have stood partially discharged or have endured many short trips without full recharge cycles will fail prematurely, often without warning. Brake fluid, coolant, and transmission fluid should be considered overdue for renewal based on calendar age rather than mileage, as hygroscopic brake fluid in particular degrades over time and can cause internal corrosion of the brake system. The exhaust system, underbody, and suspension components should be inspected for standing corrosion, particularly around jacking points, subframe mountings, and brake lines, while verifying the service book stamps to confirm recent cambelt or chain inspection, as the Mercedes-Benz A-Class of this era is sensitive to stretched timing chain guides which can present as a rattle on cold start.