2017 Mercedes-Benz C 2.1L Diesel · D20 UBO

The vehicle was last presented for MOT on 9 January 2026 and was awarded a Pass; however, the test recorded advisories relating to both front and rear brake discs showing wear and surface pitting, an offside front tyre with a superficial cut not yet penetrating to the cords, plus fitted undertrays. While the current pass is reassuring, the accumulating brake disc advisories from 2022 through to the most recent test, combined with the repeat tyre condition advisories recorded across multiple examinations, indicate a maintenance trend that is broadly stable but with persistent wear items requiring attention. Of greater concern when reviewing the broader history is the recurring pattern of suspension-related failures and advisories. A fractured offside front coil spring was identified as a major failure in November 2024, a nearside front coil spring fractured as recently as September 2023, and the 2023 test also recorded a seriously leaking offside rear shock absorber and an excessively worn nearside front suspension arm ball joint. The presence of a corroded rear coil spring advisory in 2023, alongside multiple fractured springs, suggests the front and rear suspension is undergoing progressive degradation which warrants close physical inspection prior to purchase. With a recorded mileage of 68,619 miles over approximately nine years of service, the vehicle is covering around 7,600 miles annually, which is broadly typical for a car of this age and provides a reasonable basis for assuming consistent rather than neglected use. There are no extended standing periods evident in the mileage progression, nor any indications of abnormally high annual accumulation, so wear on major mechanical components such as the engine, automatic or manual transmission, and clutch should be proportionate to the mileage rather than skewed by long periods of inactivity. That said, the relatively modest annual mileage does mean that calendar-based degradation items, including brake fluid, coolant, and the condition of rubber components such as the 12V battery, are likely to be more significant than pure wear items. Given the documented history of fractured coil springs and a leaking damper, the suspension should be examined with particular care. On a test drive, listen for clonks or knocks over speed humps and uneven surfaces, particularly from the front axle where two springs have already failed, and pay attention to any vagueness or knocking through the steering which could indicate worn suspension arm bushes or play in the ball joints, as a worn front arm ball joint was previously recorded. The rear suspension should be checked for any evidence of fluid weeping from the offside rear shock absorber, and a visual inspection underneath should look for surface corrosion on the coil springs themselves, as this has already been flagged on the nearside rear. Brake pedal feel should be firm and progressive, with no shuddering through the steering wheel under heavy application, which would indicate further disc warping beyond the current advisory level, and the discs and pads should be physically measured to confirm remaining service life. Beyond the suspension and brakes, several other practical checks are advisable. The tyres, which have been flagged on multiple occasions for cuts and edge wear, should be inspected for sidewall cracking and perishing given the vehicle's age, as tyres more than five years old can degrade regardless of tread depth. The 12V battery is now approaching the end of its typical service life for a vehicle of this age, so a voltage or load test is worthwhile, and the engine management light issue recorded as a pre-registration fail in 2023 should be confirmed as fully resolved with no stored fault codes. All major fluid services, including brake fluid which absorbs moisture over time and is typically renewed biennially regardless of mileage, plus coolant and the automatic transmission fluid if applicable, should be verified by service records. Finally, ensure a thorough road test on a variety of road surfaces to detect any noises, vibrations, or handling irregularities that the static MOT inspection cannot reveal.