2015 Mercedes-Benz S-Class 3.0L Diesel · LM15 FOU

The vehicle presents a current DVSA MOT pass dated 18 February 2026, indicating that at the most recent test it met the statutory roadworthiness requirements, which is the immediate reference point for any prospective buyer. However, the history shows an unusual pattern in that a pass and a fail were both recorded on the same date in February 2026, and a similar pass and fail combination appears on 8 March 2025, with an earlier pass logged on 26 February 2024. The presence of recorded failures on the same day as a pass suggests that a vehicle may have failed initially and then been repaired and re-presented for a partial re-test, with the second entry reflecting the retest outcome, or it could indicate an administrative recording characteristic of the MOT system where the pass supersedes the earlier fail. While the overall trend appears stable with no recorded advisories or defects on the pass certificates, the repeated dual entries warrant clarification from the seller regarding any remedial work carried out, as absence of recorded defect details means there is no documented insight into the nature of any previous failures. With approximately 91,190 miles recorded over an 11 year service life, this S-Class has averaged roughly 8,290 miles per year, which is broadly typical for a luxury saloon of its age and aligns with expectations for both private and executive use. The mileage accumulation appears moderate and consistent, suggesting neither excessive long-distance wear nor prolonged standing periods that might otherwise promote issues such as brake disc corrosion, perished rubber components, or stale fluids. That said, on a high-content vehicle of this class, components such as the Airmatic suspension system, complex electronics, and the extensive use of polybushes and rubber mounts mean that even average mileage can lead to age-related degradation independent of distance covered, particularly given the advanced suspension and damping systems fitted to S-Class models of this generation. Given the clean recorded MOT history with no advisories or documented defects, physical inspection becomes especially important for a vehicle approaching twelve years of age. A prospective buyer should carefully examine the sidewalls and tread of all tyres for signs of age-related perishing or cracking, as rubber deteriorates through ozone exposure and standing periods regardless of tread depth, and original equipment specification replacements from reputable manufacturers should be confirmed. The 12V battery and any supplementary systems should be tested for cranking performance and state of charge, since Mercedes-Benz vehicles of this era carry sophisticated electrical loads through their convenience and telematics systems, and a marginal battery can produce a cascade of electronic faults. The coolant, brake fluid, transmission fluid, and power steering fluid should be verified as recently serviced in accordance with calendar-based intervals, as brake fluid in particular is hygroscopic and should be renewed every two to three years to prevent internal corrosion of the ABS modulator and brake calipers. On a test drive, particular attention should be paid to the operation of the Airmatic air suspension, listening for the compressor running excessively, observing whether the vehicle settles overnight and rises promptly upon starting, and checking for any warning messages relating to suspension level or damping. The brake pedal should feel firm and progressive without excessive travel, and any pulling to one side under braking could indicate a binding caliper or warped disc, the latter being common on vehicles that have experienced mixed urban and motorway use. Listen for clonks or knocks from the front suspension over speed humps and uneven surfaces, which can indicate worn thrust arms, anti-roll bar bushes, or top mount bearings, all known wear items on this platform at this mileage. Finally, request evidence of recent major service items such as timing chain inspection, given the engine families fitted to this generation, and confirm that the Digital Service Book or paper service record reflects regular maintenance by a Mercedes-Benz specialist or franchised dealer, as the complexity of this vehicle demands appropriate technical support to remain reliable.