2015 Audi A6 S Line TDI Ultra S-A 2.0L Heavy oil · PN13 ELY

A consistently clean MOT record, punctuated only by a solitary failure in March 2025, defines the vehicle’s recent roadworthiness profile; the latest test on 3 March 2026 was passed with no defects noted, continuing a pattern of largely uneventful examinations since the first recorded test in January 2021. The isolated failure, despite the absence of any recorded fault, suggests an administrative or paperwork issue rather than a recurring mechanical problem, and the subsequent pass confirms that no lasting defect was identified. At 139 674 miles the car has accumulated roughly 12 700 miles per annum, a mileage level that exceeds the average for a 2015 model and indicates considerable wear on consumable and service‑interval components. The MOT history shows a regular annual testing cadence apart from a twelve‑month gap between the November 2022 and February 2024 examinations, which may simply reflect a change in ownership or timing rather than prolonged inactivity. Mechanically, the high annual mileage translates into accelerated degradation of the suspension bushings, tyre tread, brake pads and discs, as well as the timing‑chain and turbocharger bearings typical of a high‑output TDI powerplant. Prospective buyers should pay particular attention to the condition of the front and rear suspension links and bushes; any clunking or knocking over bumps, uneven tyre wear or a loose steering feel may indicate wear beyond normal limits. The braking system should be inspected for pedal feel, any judder under heavy application and the thickness of pads and discs, as high mileage often leads to glazing or uneven wear. Given the diesel engine’s age and mileage, a thorough check for turbocharger whine, excess exhaust smoke, and any oil seepage around the valve cover or turbo housing is advisable, as these are common failure points in heavily used TDI units. A full pre‑purchase inspection is recommended, with emphasis on the timing‑chain tensioner, DPF regeneration performance, clutch engagement smoothness and the condition of the drive shafts and CV joints. Requesting the detailed MOT failure notice from March 2025 may also clarify whether the failure was purely administrative. Confirming the absence of leaks, abnormal noises and ensuring all safety‑critical systems operate within specification will provide a clearer picture of the car’s remaining service life.