2020 Mercedes-Benz C 300 AMG Line ED Prem D A 1.9L Diesel · 14 JAM

A 2020 Mercedes-Benz C300 AMG Line with this MOT record presents a broadly tidy roadworthiness profile, though not an unblemished one. Four tests are recorded across the past three cycles, with the most recent on 18 February 2026 resulting in a pass, accompanied only by a minor advisory for a windscreen chip within permitted limits. However, the 2025 test cycle contains a notable event: the vehicle was presented on 26 February 2025 and initially failed with a Dangerous defect for ply or cords exposed on the nearside rear tyre, a categorisation that renders the car unroadworthy until rectified. The same test subsequently recorded a pass after presumably remedial work, alongside two advisories for thin rear brake pads and slight deterioration of the rear prop shaft flexible coupling. Outside of this cluster, the 2023 and 2024 tests were recorded clean with no advisories, leaving the overall trajectory as one of stable roadworthiness punctuated by a single tyre-related failure and early signs of wear on drivetline and braking components. With recorded mileage of 35,618 miles spread over approximately six years, the vehicle is accruing around 5,900 miles annually, a notably low rate for a modern premium executive saloon. There are no large gaps in the annual testing cadence visible in the MOT history, and the mileage progression between tests appears consistent with this gentle accumulation. Mechanically, such restrained use reduces wear on high-stress items like the clutch, turbocharger and engine internals, but it does bring considerations of its own; components designed for regular operation, including the diesel particulate filter on this diesel-automatic variant, the air conditioning compressor, and various rubber boots and seals, can suffer when standing unused for extended periods. The 2026 test date falls within the expected annual window, and there is no evidence in the records of a multi-year absence from testing. The advisories recorded in 2025 warrant focused attention during any pre-purchase inspection. The note on rear brake pad wear suggests the pads may now be approaching or past the point of replacement, so a physical check of remaining friction material thickness on both rear corners is sensible, and the buyer should also inspect the rear brake discs for any corresponding lip formation or hot spots, listening for any binding or judder through the pedal on a firm stop from speed. The rear prop shaft flexible coupling is a wear item on rear-wheel-drive Mercedes platforms and the advisory indicates the early stages of deterioration; on a test drive, any clonking or rotational slop on take-off and overrun, particularly when engaging drive or reversing, would suggest the coupling has progressed beyond the advisory stage. Given the Dangerous tyre failure on the nearside rear, the current set of tyres should be examined closely for age, tread depth across the full width, and any uneven shoulder wear that might point to an underlying alignment or suspension geometry issue. The clean 2023 and 2024 entries provide reassurance around the main inspection items such as suspension components, exhaust integrity, lighting and braking balance, but a low-mileage diesel of this age can still harbour issues outside the MOT scope. The DPF should be confirmed as having completed regular active regenerations, ideally evidenced through diagnostic data, as short journeys are precisely the usage pattern most likely to cause incomplete burns and eventual restriction. A thorough road test should cover warm-up behaviour, transmission smoothness through the automatic box, and any tell-tale signs of oil misting from the engine or turbocharger seals. Inspecting the underbody for corrosion on subframe mounting points, brake pipe runs and suspension arms is also prudent given the salt exposure typical of UK winter roads, even though no corrosion advisories have yet appeared on this record.