2017 Mercedes-Benz C 2.1L Diesel · EC52 MTC

The vehicle most recently passed its MOT test on 13 July 2026, though a single advisory was issued regarding the rear brake discs being worn, pitted, or scored but not seriously weakened. Looking at the broader MOT history, the overall trend suggests stable but increasingly aged maintenance requirements rather than acute decline. The car passed cleanly in 2022, 2023, and 2024 with minimal issues, but the 2025 test cycle saw a failure for dangerous rear brake pad wear and an illegal rear tyre, alongside advisories for deteriorating rear suspension bushes on both sides and the same pitted rear brake discs now appearing consistently across consecutive tests. This pattern indicates wear items reaching the end of their service life rather than neglect, but the recurrence of brake disc pitting across three consecutive tests suggests the discs have not been replaced and are likely approaching the point at which further pad changes alone will no longer be sufficient. With approximately 92,444 miles recorded over nine years, the vehicle averages roughly 10,272 miles per year, which is broadly typical for a car of this age and represents genuine regular use rather than extended standing periods. The MOT record shows annual testing with no significant mileage gaps, which is mechanically favourable as it implies the engine, transmission, brakes, and suspension components have all been worked consistently. That said, at this mileage level, particularly on a 2017 Mercedes-Benz C-Class, attention should be directed toward higher-mileage service items such as timing chain stretch if applicable to the variant, automatic transmission fluid condition, and the general state of engine and gearbox mountings, all of which fall outside the MOT scope but warrant scrutiny at this odometer reading. Given the recurring advisories, particular attention should be paid to the rear brake system during inspection. The pitted and scored rear discs should be physically inspected for lipping at the outer edge and measured for minimum specification, because pitted surfaces accelerate pad wear and can produce brake shudder under heavy application. A test drive should include firm pedal applications from moderate speed to detect vibration through the brake pedal, and a listen for any grinding or squealing from the rear axle indicative of worn pads or backing plate contact. The rear upper suspension rod bushes flagged on both sides in 2025 should be checked for continued deterioration, as worn bushes in this area commonly produce a clonking or knocking noise over speed humps and uneven road surfaces, together with vague or wandering rear-end behaviour during cornering. Fresh advisories on the same components in 2026 would warrant prompt attention. Beyond the recorded advisories, a prospective buyer should carry out the usual age-and-mileage-appropriate physical checks. Tyre sidewalls should be examined for perishing or cracking from age, particularly on the rear axle where a nail penetration was previously recorded, and the production date codes on all four tyres verified to ensure they are not excessively old regardless of tread depth. The 12-volt battery should be load-tested, as Mercedes-Benz vehicles of this generation are sensitive to voltage drop and a failing battery can produce a cascade of electrical warnings. Brake fluid should be changed every two years irrespective of mileage due to its hygroscopic nature, and the coolant, automatic gearbox fluid, and final drive oil if applicable should be checked for service history stamps. Given that the car is nine years old with average annual use, the underbody and wheel arches should be carefully inspected for corrosion, particularly around suspension mounting points and subframe interfaces, and all flexible brake hoses, expansion tank, and coolant pipes examined for the rubber degradation commonly seen on Mercedes-Benz products of this era.