2014 Mercedes-Benz S-Class 3.0L Diesel · OB14 CON

A 2014 Mercedes-Benz S-Class with this mileage and MOT history presents an unusually clean roadworthiness profile. Across four consecutive tests from 2022 through August 2025, the vehicle passed each examination without a single advisory or defect recorded, and the most recent pass on 12 August 2025 was achieved with a clean sheet. For a luxury saloon of this age, a run of defect-free MOTs is notable and suggests the chassis, braking, suspension, and exhaust systems have been maintained to a standard well above the minimum test threshold. The absence of any recorded advisories means there is no documented evidence of corrosion on structural components, deteriorating brake lines, worn suspension bushes, or exhaust deterioration within the MOT record itself. The recorded mileage of 171,759 miles against a 12-year registration equates to an annual accumulation of roughly 14,313 miles, which sits well above the typical average for a private vehicle. This level of sustained use places greater mechanical demand on the consumable and chassis components typically flagged during inspection, including brake discs and pads, coil springs, suspension arms, anti-roll bar links, and drivetrain mounts. Even though the MOT history shows no advisories, the higher-than-average mileage means that components not visible or testable under MOT conditions, such as interior trim wear, seat mechanism function, AIRMATIC air suspension components, and infotainment electronics, warrant close physical inspection. There are no significant gaps in testing history that would suggest prolonged off-road periods, and the mileage progression between tests appears broadly consistent with regular use rather than sporadic long-distance trips. For a prospective buyer, the absence of recorded defects should not remove the need for a thorough physical appraisal. On a test drive, listen carefully for any clonks or knocks from the front suspension over uneven surfaces, particularly on full lock or when traversing speed humps, as worn lower wishbones and thrust arms are common S-Class issues at this mileage. The braking system should be tested for any vibration through the steering wheel or pedal under firm application, which would indicate warped front discs, and for any pulling to one side that could suggest a binding caliper. The AIRMATIC suspension, if fitted, should settle promptly after ignition and should not drop overnight, as air spring leaks and compressor wear are well-documented concerns on high-mileage W222 chassis. Under the bonnet, inspect the engine and surrounding components for oil residue around the cam covers, the area around the oil filter housing, and the underside of the vehicle for any signs of active leaks. Check the condition and pressure of all four tyres, looking for uneven shoulder wear that could point to suspension geometry issues not yet severe enough to fail an MOT but indicative of advancing wear. Finally, verify that all electronic systems, including the COMMAND infotainment, electric seats, windows, and the pneumatic door closure function, operate as intended, as rectification of air strut and electronic faults on this model can be disproportionately expensive relative to its market value.