2010 Mercedes-Benz C 2.1L Diesel · LP59 NPA

The vehicle achieved a Pass at its most recent DVSA MOT test on 17 August 2026, but the record carries two advisories that warrant attention: a minor oil leak from the engine or sump area, and brake pipe corrosion across the front and rear of the chassis that has been covered with grease or a similar protective material. Looking at the broader MOT history, the maintenance trend appears broadly stable in that the car continues to pass, yet there is a clear and persistent pattern of front suspension component wear, anti-roll bar linkage deterioration, and progressively widespread brake pipe corrosion that has been flagged at virtually every test since 2020. The suspension advisories escalated in severity from dust cover deterioration in 2021 and 2022 to recorded slight play in the ball joints by 2025, suggesting the front end is gradually loosening, while the brake pipe corrosion advisories have expanded in scope from the nearside rear in earlier tests to both front and rear systems now. None of these items have yet reached failure threshold, but the cumulative trajectory points to components that are progressively degrading rather than being rectified. Against its 2010 registration date and 148,239 recorded miles, the vehicle has covered approximately 9,265 miles per year, which is broadly typical for a sixteen-year-old car of this class. There are no glaring anomalies such as extended standing periods or excessively high annual accumulation that would in themselves raise suspicion of clock irregularity, and the mileage progression between tests is consistent with normal mixed usage. That said, the absolute mileage is high for a Mercedes-Benz of this generation, and high-mileage petrol and diesel C-class models are particularly prone to wear in the engine oil circuit, automatic transmission, turbocharger (on diesel variants), and suspension subframes. The recorded oil leak advisory is therefore meaningful, as even a minor seep at this mileage can indicate ageing gaskets or seals on the engine or, on diesel variants, oil cooler and turbo feed line degradation that can worsen with use. For a prospective buyer, the recurring brake pipe corrosion deserves the most immediate physical inspection. The advisories suggest the lines have been treated with grease rather than replaced, which is a common short-term measure but does not arrest internal corrosion of the steel brake pipes. On a test drive, listen for any spongy brake pedal feel, excessive pedal travel, or pulling to one side under braking, which could indicate a pipe that has finally perforated. Have the underside inspected on a ramp to assess the true extent of corrosion, particularly along the underbody fuel lines, the rear axle lines, and any sections passing through wheel arch liners where road salt accumulates. The front suspension wear pattern is equally important: the advisories on anti-roll bar linkage ball joints and lower suspension arm ball joints indicate progressive loosening. Test for clonking or rattling noises from the front end over speed humps, rough surfaces, and during direction changes, and check for uneven inner or outer tyre wear which would betray worn or failing front suspension components. Front tyres on this car should be examined for feathered edges, a classic symptom of anti-roll bar link play. Beyond the flagged advisories, a vehicle of this age and mileage warrants thorough age-related inspection regardless of MOT outcome. Check all tyres, including any spare, for sidewall perishing and cracking from age, which can render a tyre unsafe even with adequate tread depth, and verify that all four tyres are of matching make, age, and tread pattern. Inspect the 12V battery for its production date stamp, as a sixteen-year-old car may well be on a replacement, and cold cranking performance should be checked since weak cells cause erratic electronics and warning lights. Brake discs, particularly the rear items, should be examined for corrosion ridges or binding calipers given that the car has covered high miles, and a handbrake holding test on an incline will reveal any seized rear caliper mechanism. Service history verification is essential: confirm recent renewal of engine oil and filter, automatic transmission fluid and filter (Mercedes-Benz recommends fluid changes at regular intervals on this generation), brake fluid (which degrades on a calendar basis and should be replaced every two years regardless of mileage), and coolant. Finally, on test drive, allow the engine to reach full operating temperature and listen for timing chain rattle on initial cold start, check the automatic transmission for smooth kickdown and absence of flare or shunt between ratios, and ensure the instrument cluster, air conditioning compressor, and central locking function reliably, as electrical faults on high-mileage W204 chassis C-class models are not uncommon.