2013 Mercedes-Benz SLK 2.1L Diesel · SJ54 ADS

The most recent MOT history for this 2013 Mercedes-Benz SLK reveals a concerning pattern of repeated failures at the same mileage intervals, despite no recorded defects on either test. The vehicle failed twice in succession in May 2025—once on the 27th and again on the 28th—before passing the following May. This suggests either a critical component was overlooked during the first attempt or a recurring issue that evaded detection, such as a marginal suspension bush or binding caliper that only manifested under specific test conditions. The lack of specific advisory notes in the records means the failures were likely due to procedural oversights rather than overt mechanical failure, but the repetition implies a need for closer scrutiny of high-wear areas. The recorded mileage of 59,258 miles over 13 years—approximately 4,558 miles annually—indicates unusually light usage for a vehicle of this age. The gaps between tests are consistent at roughly 3,000 miles, with no rapid accumulation or prolonged periods of inactivity. While low mileage generally correlates with reduced wear on suspension, brakes, and drivetrain, the repeated MOT failures suggest the owner may have deferred regular maintenance rather than simply driven less. The absence of advisories for corrosion or structural concerns also implies the vehicle has been stored or driven in conditions that minimised rust development. Given the repeated failures without specific defects noted, a buyer should prioritise an independent inspection of the suspension system, particularly the rear bushes and coil springs, as these are common sources of intermittent MOT failures. The braking system warrants thorough examination, including disc run-out, caliper binding, and master cylinder condition, since brake-related issues often trigger repeated test failures. Additionally, the exhaust system should be checked for leaks or corrosion, especially if the vehicle has spent time stationary, as this can lead to hidden damage. While the MOT record does not indicate overt structural concerns, a detailed underbody inspection for rust in wheel arches and sills is advisable to confirm the vehicle’s long-term integrity.