2017 Audi A6 S Line TDI Ultra S-A 2.0L Diesel · ST05 ROO

A clean and consistent MOT history establishes this 2017 Audi A6 S Line TDI Ultra S-A as a vehicle with a strong, uninterrupted track record of roadworthiness. Across five consecutive tests spanning from August 2021 through February 2026, the car has passed every examination without a single advisory, defect entry, or failure, including the most recent assessment on 13 February 2026. The absence of any flagged items across nearly five years of testing suggests that components typically subject to wear monitoring under the MOT regime, such as the braking system, suspension components, tyres, lighting, exhaust, and structural corrosion points, have consistently met the required standards. This unbroken run of clean results is the defining mechanical characteristic of the vehicle and represents a reassuring baseline for any prospective buyer. With 101,015 miles recorded against an age of approximately nine years, the car has covered an average of around 11,224 miles annually, which sits comfortably within typical usage expectations for a premium executive diesel of this vintage. The annual mileage progression inferred from the test dates indicates steady, regular use rather than either long periods of inactivity or disproportionately heavy accumulation. This kind of consistent running is generally favourable mechanically for a modern diesel powertrain, as it allows the engine, diesel particulate filter, turbocharger, and associated emissions control systems to operate within their intended thermal and load parameters. The absence of multi-year lay-ups in the testing record further reduces the likelihood of issues such as fuel system degradation, seized brake calipers, or deteriorated rubber components that can arise from prolonged standing. A smooth usage curve such as this is one of the better patterns to encounter in a used executive vehicle. For a prospective buyer, the most valuable inspection priorities now shift to those components that fall outside the scope of the MOT or that would only begin to show wear beyond the most recent test. Given the mileage now exceeding 100,000 miles, attention should focus on the condition of the timing belt or chain service interval as specified by Audi, the diesel particulate filter, and the dual-clutch S-tronic transmission oil and mechatronic condition. A test drive should be conducted with deliberate focus on smooth, consistent gearchanges under both light and moderate throttle, listening for any shudder, hesitation, or clonking from the transmission, particularly when moving from a standstill in first and second gear. Any slipping, delayed engagement, or warning message relating to the gearbox would warrant immediate professional assessment, as S-tronic repairs can be substantial. Underneath the vehicle, the suspension and braking systems should be exercised over varied road surfaces to detect any deterioration not yet severe enough to have triggered an advisory. Listen for clonks or knocks from the front suspension over speed humps and uneven tarmac, which could indicate worn control arms, anti-roll bar links, or top mount bearings, all known wear items on high-mileage Audis of this generation. The brakes should be tested for smooth, even response without any pulling to either side, and the pedal should feel firm rather than spongy, as a soft pedal could indicate perished brake fluid or air ingress in the hydraulic system. Visually inspect the inner and outer edges of the front brake discs for a pronounced lip and any signs of corrosion pitting, as discs approaching the end of their service life can produce judder under heavy braking. Finally, examine the underbody and wheel arch liners for any emerging corrosion, particularly around the subframe mounting points and rear suspension components, as salt exposure over nine winters can initiate surface rust before it becomes structurally significant. A pre-purchase inspection by an independent specialist familiar with Audi vehicles would be a prudent final step given the mileage and the premium nature of the components involved.