2019 Mercedes-Benz E 1.9L Diesel · T36 DCC

A pattern of tyre-related non-compliance sits at the centre of this E-Class's recent MOT story, and it is the defining mechanical concern a buyer must take seriously. On 2026-03-02 the vehicle failed with a Dangerous defect recorded against the nearside rear tyre, where tread depth was found below the statutory 1.6mm minimum. The same test also raised two advisories for the offside front and offside rear tyres, both noted as worn close to the legal limit with the front example showing inner-edge baldness at 3.64mm. Two days later the car returned and passed cleanly, suggesting replacement tyres resolved the immediate failure, but the simultaneous wear across three positions points to either an alignment geometry issue, uneven rotation, or simply consumables that were left to run past their service life. Prior to this episode, the record is notably clean: the 2025, 2024, 2023 and 2022 tests all passed without any tyre advisories, which makes the March 2026 cluster of defects more conspicuous than it would otherwise appear. Annual mileage of roughly 10,727 miles across the seven-year span is broadly consistent with typical usage for a vehicle of this age, and the testing pattern is regular and unbroken, with annual or near-annual entries from 2022 through 2026 and no multi-year gaps that would suggest extended periods off the road. The mileage progression between recorded tests is steady rather than abrupt, indicating the car has been in continuous active service rather than subjected to short bursts of heavy use followed by long lay-ups. There is no evidence in the DVSA record of any unusual mileage jump between consecutive tests, and the absence of long absences means there is no specific elevated concern regarding stale brake fluid, seized calipers, or dried-out transmission components that can accompany vehicles left standing. Mechanically, this usage profile is consistent with normal wear rates for consumables and is the most likely explanation for the brake disc advisories recorded in 2025. The advisory items raised on 2025-02-27 deserve close attention on any pre-purchase inspection, as they cluster around the suspension and braking components most prone to wear on a Mercedes of this mileage and age. The nearside lower suspension arm ball joint was noted as having slight play rearwards of the front ball joint, which is a precursor to the more pronounced knocking or clonking that develops as the joint worsens; on a test drive, listen for a dull thud or rattle transmitted through the cabin when traversing speed bumps, potholes, or undulating A-road surfaces, and feel for imprecise steering response or a slight wandering at motorway speeds. Both rear brake discs were flagged as worn but not excessively, which on a rear-driven E-Class is consistent with normal service life but should prompt a physical measurement of remaining disc thickness on a ramp to ensure sufficient material remains before the next pad change. The rear axle differential oil leak from the diff pan, noted as not excessive, warrants a current under-floor check; a small wet patch that has not grown between tests is acceptable, but active dripping or oil contamination on the rear underbody panels would suggest a deteriorating seal. The tyre defects from the March 2026 failure episode must be considered alongside any current alignment readings, as the inner-edge wear pattern on the offside front is characteristic of either negative camber, worn thrust or control arm bushes, or a steering component that has shifted from its original geometry. On a test drive, release the steering on a straight, flat road and observe whether the car tracks dead straight or pulls to one side, and listen for any humming or drone that changes with speed, which can indicate unevenly worn tyres distorting under load. Inspect all four tyres for matching brand, model, and tread pattern, as the March 2026 test outcome implies at least three tyres were renewed in close succession. Given the 2025 advisory relating to suspension ball joint play, a physical check of all front lower arm joints, track rod ends, and the rear subframe mounting points for corrosion is advisable, as Mercedes chassis components of this vintage can develop surface rust in the jacking and mounting zones. The brake system should also be evaluated for binding calipers by confirming the rear discs rotate freely by hand on a cold inspection and that the handbrake holds on a moderate incline without excessive lever travel.