2010 Mercedes-Benz C 1.6L Petrol · OU10 XBC

A 2010 Mercedes-Benz C-Class showing 145,197 miles carries an MOT history that, on the surface, looks clean but warrants close scrutiny. The most recent test on 9 May 2025 was recorded as a pass with no defects, yet on the very same date a failure was also logged with no defect detail visible. This dual entry is unusual and typically indicates that the vehicle was presented, failed on a specific item, was repaired on site or returned the same day, and was then re-presented and passed. The same pattern occurred on 30 October 2023, with a pass and a prior failure both recorded on 17 October 2023, again with no defects listed. While the absence of advisory notes on every record is a positive indicator of a tidy car, the repeated same-day retest pattern suggests the vehicle has had a consistent, recurring issue that is addressed just before each annual test rather than being a once-off. A prospective buyer should request the actual failure sheets from the testing station to identify what component is repeatedly flagging, as this will reveal whether it is a minor wear item or something more structural. The mileage profile of roughly 9,075 miles per year is broadly consistent with average annual driving for a sixteen-year-old vehicle, neither excessively high nor low enough to raise immediate concerns about long-term standing. There is a gap of approximately nineteen months between the 2022 and 2023 test entries, which aligns with the MOT exemption rules in place at that time but is worth noting. The mileage accumulation between tests is steady rather than showing any sudden spikes or extended periods of zero use, which is mechanically favourable. At this mileage point, wear on suspension bushes, engine and gearbox mountings, and turbo components (if applicable to the variant) is to be expected, but the consistent usage pattern suggests these items have been worked rather than allowed to degrade through inactivity. Given the repeated same-day retests, the priority on any inspection should be identifying the component that has caused the recurring failure. Common candidates on a high-mileage C-Class of this era include rear suspension components, particularly the trailing arms and subframe mounting points, front lower wishbone bushes, and brake-related issues such as binding calipers or corroded brake lines. During a test drive, listen for clonks or knocks from the rear suspension over speed humps and uneven surfaces, as Mercedes of this generation are well known for rear subframe and trailing arm wear. Pay close attention to any pulling under braking, uneven tyre wear across an axle, or a soft or spongy brake pedal, all of which could point to the items most likely to have triggered the past failures. Beyond the specific concern raised by the retest history, a thorough physical inspection should focus on the usual high-mileage wear points. Check for any oil seepage from the engine sump, valve cover gasket, and the rear of the cylinder head, as well as any transmission oil residue around the gearbox casing. Examine the exhaust system for corrosion at the joints and mounting rubbers, particularly given the vehicle's age and mileage. Inspect the underside for any surface corrosion, paying particular attention to the rear axle assembly, brake lines, and mounting points, as these are the areas where Mercedes of this era commonly develop advisories. Finally, verify the operation of all electronic systems, including the central infotainment screen, climate control, and electric seat memory functions, as electrical gremlins become more prevalent on these models as they age. Confirming the reason behind the repeated retests should be the first step before committing to purchase.