2017 Mercedes-Benz X 2.3L Diesel · YA67 LCC

The mechanical narrative of this Mercedes-Benz X-Class is one dominated by brake wear, with a clear progressive pattern of deterioration visible across the brake components recorded at the most recent tests. The 2026-07-09 pass with an advisory for a worn, pitted, and scored front brake disc represents the latest chapter in a history that escalated from a clean pass in 2024, through a failed retest in late July 2025, to this current advisory. That intervening failure revealed nearside front inner drive shaft CV boot damage alongside thin brake pads at both axles, while the rear brake discs and pads were also flagged as approaching the end of their service life. The rapid succession of brake-related advisories within a twelve-month window suggests the braking system has entered an accelerated wear phase, which warrants close inspection of all related hardware. Beyond braking, the record is otherwise encouraging, with two consecutive clean passes in 2023 and 2024 indicating the vehicle has historically been presented in sound mechanical order. Recorded mileage of 97,958 miles across nine years equates to an annual accumulation of roughly 10,884 miles, which is broadly typical for a working vehicle of this age and aligns with the well-maintained appearance of the earlier MOT results. The annual test cycle has been consistent, with no significant gaps or periods off the road that would suggest prolonged standing or intermittent use. The mileage progression between tests appears steady rather than erratic, indicating a vehicle that has been in regular service rather than one subjected to short, aggressive trips or extended storage. This consistency supports the view that wear-related defects such as brake component degradation are likely the natural consequence of active service rather than any underlying structural or mechanical neglect. Given the repeated brake-related advisories, a prospective buyer should treat the entire braking system as a priority area for physical inspection and budgeting. The front brake discs, last flagged in 2026, should be checked for lipping on the outer edge and excessive run-out by feeling through the steering during a slow-speed stop, while the rear discs, noted as worn in mid-2025, should be inspected similarly by selecting a quiet residential road and applying the brakes firmly from moderate speed to detect any judder or pulsing in the pedal. Brake pad material should be visually confirmed above 3mm at all four corners, and the condition of the flexible brake hoses, rigid brake pipes, and caliper slide pins should be examined for corrosion, perishing, or seizing, as sticking calipers are a common cause of uneven pad wear on vehicles of this age and mileage. The single Major defect recorded at the 2025 retest regarding the nearside front inner drive shaft CV boot is a critical area to verify has been properly rectified. On a test drive, listen for a rhythmic clicking or knocking from the front of the vehicle during tight low-speed turns, particularly when reversing with full steering lock, which would indicate a damaged CV joint rather than merely a perished boot. Inspect the inner and outer CV boots on both front driveshafts for any signs of fresh grease, cracking, or perished rubber that might suggest the repair was incomplete or that the opposite side is now deteriorating. Additionally, given the working nature implied by the vehicle type and mileage, listen for any clonking or knocking over uneven road surfaces, as the X-Class is known to develop wear in front suspension components such as anti-roll bar bushes, lower control arms, and top mount bearings, all of which should be physically checked for play before purchase.