2020 Mercedes-Benz B 1.9L Diesel · FX70 MFZ

Tyre sidewall deterioration dominates the MOT record, with successive advisories in 2023, 2024 and again in 2025 flagging progressive loss of tread on the outer sidewalls of both front tyres; the most recent test on 7 September 2026 recorded a clean pass but left the tyre condition unaddressed, indicating that the wheels remain the principal mechanical risk on this vehicle. At 37,751 miles after six years the average annual mileage sits at roughly 6,300 mi, which aligns with typical usage for a 2020 Mercedes‑B‑Class. The mileage progression shows no abrupt spikes or prolonged gaps between tests, suggesting a steady rate of wear rather than periods of intensive short‑term use that might accelerate component fatigue. This moderate accumulation is consistent with the observed front tyre sidewall wear, as the outer edges of front tyres tend to suffer when mileage is accumulated under regular, mixed‑road conditions. Prospective buyers should inspect the front tyres closely for any cracking, bulging, or loss of structural integrity on the outer sidewalls, and verify that the tread depth meets the legal minimum of 1.6 mm across the entire width. Uneven wear may point to mis‑alignment or worn suspension bushes, so a visual check of the front wheel alignment settings and a brief test‑drive for any steering pull to one side are advisable. Listen for thumping or vibration over road imperfections, which can signal that the tyre carcass is compromised and may require immediate replacement. With no recorded failures on any other system, attention should still be given to the usual road‑worthiness checks: ensure the brakes engage without judder, confirm that the steering feels crisp and free of play, and look for any signs of corrosion around wheel arches or suspension mounting points. A thorough test‑drive that includes gentle braking, cornering, and a short run over a speed bump will help reveal any latent issues that the MOT history has not highlighted.