2010 Mercedes-Benz CLS 3.0L Diesel · OV59 WPM

The most recent DVSA examination on 31 December 2025 resulted in a Pass, although the test was accompanied by five advisory items that warrant careful attention. Recurring advisories across the 2025 and 2024 tests have progressively highlighted deteriorating brake pipework at both the front and rear axles, alongside front direction indicator discolouration, and these noted defects are now accumulating rather than resolving. The previous test in January 2025 initially recorded a Fail due to ineffective front wiper operation, and the 2023 examination involved a Fail for a deeply cut nearside front tyre and a fractured offside rear coil spring, followed by a Pass immediately afterwards. Overall, the trajectory suggests a vehicle that is being presented for test with a deteriorating rather than improving maintenance profile, with the structural and safety-critical brake line corrosion advisories representing the most pressing long-term concern. With a recorded mileage of 57,332 miles against an age of approximately sixteen years, the annual accumulation works out at around 3,580 miles per year, which is exceptionally low for any passenger vehicle and particularly for a large, complex executive saloon such as the CLS. Such low usage typically reflects extended periods of standing interspersed with occasional shorter journeys, often meaning that time-related degradation rather than distance-related wear will dominate the mechanical condition. Although the odometer reading spares wear on major drivetrain components, it raises concerns about calendar-based deterioration of fluids, seals, battery health, brake caliper seizure from corrosion, and standing water ingress within the exhaust system. The buyer should not be lulled into a false sense of security by the modest mileage, as standing degradation in a sixteen-year-old car frequently presents more intrusive rectification costs than straightforward service items. In view of the recurring advisories, particular attention must be directed to the brake pipework, which has been flagged on three consecutive tests for surface corrosion on both front and rear lines as well as corrosion to the brake hose ferrules at the rear. Although the application of grease or protective material has permitted the vehicle to continue passing, the underlying corrosion will progress beneath any treatment, and a prospective purchaser should arrange a thorough underbody inspection to verify the integrity of the brake lines, the condition of the flexible hoses, and the security of all related fittings. The advisories relating to tyre condition, including a noted cut on the nearside front tyre and prior outer sidewall damage, indicate that the rubber compounds on this vehicle may be approaching the end of their service life despite adequate tread, and the cut should be closely examined to ensure it remains within legal and safety limits. A test drive should be conducted with particular emphasis on firm and progressive brake pedal response, listening for any scraping, grinding, or pulsation through the pedal that may indicate corroded or binding brake components, and the rear suspension should be assessed over uneven road surfaces for any knocking, clonking, or instability suggestive of further coil spring fracture, given that one rear spring has previously failed. Beyond the documented advisories, the age and usage profile of this vehicle demands a rigorous physical inspection covering items that low mileage and standing periods tend to compromise. The 12V battery should be load-tested, as extended periods of inactivity severely shorten battery life and may already be causing starting difficulties or electronic warning lights. All fluid compartments, including engine oil, coolant, brake fluid, power steering fluid, and automatic transmission fluid, should be inspected for condition and age, with brake fluid particularly susceptible to moisture absorption over time and recommended for replacement on a calendar basis regardless of mileage. The underbody, including the exhaust system, fuel lines, and subframe mounting points, should be examined for advanced corrosion, while the brake calipers and handbrake mechanism should be checked for free movement, as seized calipers are a frequent consequence of low-use vehicles. Tyres should be inspected for sidewall cracking and perishing consistent with their age, and the alloy wheels and arch liners should be reviewed for evidence of standing corrosion. Finally, verifying a full and consistent main dealer or specialist service history with documented brake fluid changes, cambelt or timing chain inspection where applicable, and recent battery replacement will provide essential reassurance that the vehicle has been properly looked after during its prolonged standing periods.