2013 Mercedes-Benz CLA 2.1L Diesel · HO55 PER

The most recent MOT test completed in September 2025 resulted in a pass, however, the overall maintenance trend shows signs of emerging concern regarding the braking system. While the vehicle maintained a clean record with no defects from 2018 through to 2023, the last two consecutive tests have flagged advisories related to corroded brake pipes. This indicates a progressive degradation of the hydraulic lines rather than an isolated incident, suggesting that while the vehicle remains roadworthy for now, the structural integrity of the brake system is beginning to decline. With a recorded mileage of 133,343 miles over approximately thirteen years, the vehicle has averaged roughly 10,257 miles per annum. This usage profile is considered typical for a vehicle of this age and class, representing a balanced mix of driving that avoids the extremes of heavy commercial use or excessive short-trip idling. From a mechanical standpoint, you should expect standard wear on consumable components such as suspension bushes, coil springs, and drivetrain mounts, but the mileage does not suggest an abnormally high level of mechanical fatigue or rapid component depletion. Given the recurring advisories concerning brake pipe corrosion, a thorough physical inspection of the vehicle's underside is essential. You should specifically examine the brake lines for signs of heavy scaling, pitting, or fluid weeping, especially near the nearside rear as previously noted. During your test drive, pay close attention to the brake pedal feel; any sensation of sponginess, a soft pedal, or a change in pressure could indicate that the corrosion is affecting hydraulic integrity. Furthermore, listen for any unusual noises or vibrations when braking, which might suggest that the corrosion is accompanied by issues with the calipers or mounting points. Beyond the braking system, the age of the vehicle necessitates a check of other time-sensitive components. Inspect the condition of all rubber elements, including engine mounts, coolant hoses, and tyre sidewalls, for signs of perishing or cracking, which can occur regardless of mileage. It is also advisable to verify the service history to ensure that fluid changes, such as brake fluid, engine oil, and coolant, have been performed according to manufacturer intervals rather than just mileage. Ensuring that the brake fluid has been replaced recently is particularly important given the existing advisories on the brake pipes to prevent internal moisture-driven corrosion.