2018 Mercedes-Benz B-Class 2.1L Diesel · WX18 SPV

A recurring pattern of tyre‑edge wear coupled with emerging suspension knock defines the mechanical narrative of this 2018 Mercedes‑B‑Class; every MOT since 2021 has flagged tyres at or near the legal limit and, from 2024 onward, a slight knocking on the front suspension has been noted, while the most recent test on 9 January 2026 confirmed the car passed but retained three front‑inner tyre wear advisories and a rear‑inner tyre advisory. No outright failures appear in the five recorded tests, yet the consistency of tyre‑related advisories and the appearance of a front‑suspension knock suggest progressive wear that has not yet breached the pass threshold. At 117 059 mi the vehicle averages roughly 14 600 mi per year, a mileage level above the UK average for a car of its age and indicative of relatively heavy use. The MOT schedule shows annual testing with no significant gaps, confirming that the mileage has been accumulated steadily rather than in large, undocumented bursts. Such a usage profile typically accelerates wear on consumables—tyres, brake pads and discs, and suspension bushings—while also increasing the likelihood of component fatigue in the steering and chassis. Prospective buyers should inspect all four tyres for tread depth, sidewall integrity and any signs of edge cupping; the repeated “worn close to legal limit” advisories mean the current tread may be marginal and could require replacement soon. During a test drive, listen for any metallic knock or thudding over bumps, especially from the front left side, which could confirm the shaker‑plate or D‑bar bush wear noted in 2024; feel for any looseness or vibration in the steering column that might indicate deteriorating bushings. Examine the front wheels for the slight distortion previously recorded on the off‑side inner rim, checking for wobble when the wheel is spun by hand, as even minor rim out‑of‑round can affect tyre wear and handling. Brake performance warrants particular attention: advisories about front‑brake imbalance (2024) and thin pads with modest disc wear (2021) suggest the braking system is approaching the limits of its service life. On a drive, test for pedal feel—any pulsation, judder, or pull to one side may reveal uneven pad wear or disc issues. Verify that the front brake pads have sufficient material by visual inspection through the wheel spokes, and confirm that the discs show no scoring or excessive run‑out. Addressing tyre replacement, front‑suspension bushings and a brake service together would likely restore the vehicle to a more robust road‑worthy state.