2010 Mercedes-Benz B-Class 1.5L Petrol · KP10 XKN

Recurring exhaust system issues and emissions irregularities represent the primary mechanical concern for this vehicle, as evidenced by the failed test on 2 May 2026 and subsequent passing test on 7 May 2026. While the most recent result was a pass, the record shows a persistent advisory for a minor exhaust gas leak that was already present during the May 2026 failure. Furthermore, the failure in May 2026 regarding high carbon monoxide and lambda readings suggests previous issues with the combustion process or exhaust sensor accuracy. This pattern of emissions-related failures, combined with earlier electrical failures concerning indicators and headlamps, indicates a recent trend of declining compliance that required remedial work to rectify. The vehicle has covered 101,299 miles over its sixteen-year lifespan, which equates to an average annual accumulation of approximately 6,331 miles. This usage profile is consistent with typical low-to-moderate residential driving rather than high-intensity motorway use. From a mechanical standpoint, this level of mileage suggests that while major drivetrain components may not have reached extreme wear thresholds, consumable items such as suspension bushes, braking components, and rubber seals are well within their expected service life cycles. The relatively steady annual mileage suggests a consistent usage pattern without significant periods of prolonged inactivity. Prospective buyers should pay close attention to the exhaust system and emissions performance during a test drive. Given the recent major failures for lambda readings and carbon monoxide levels, it is important to listen for any irregular engine idling, hesitation during acceleration, or changes in engine note that could indicate a lingering issue with the catalytic converter or oxygen sensors. The advisory for a minor exhaust leak should be investigated; listen for any audible hissing or increased engine noise under load, which could point to failing gaskets or manifold issues. Additionally, the advisory for thin front brake pads suggests that the braking system is approaching a maintenance interval, so the driver should check for any grinding noises or reduced pedal firmness. The most recent advisory regarding a distorted offside rear tyre requires physical inspection to ensure there is no underlying suspension or wheel bearing issue causing uneven wear or impact damage. During the test drive, pay close attention to the rear of the vehicle for any lateral movement, vibrations through the chassis, or rhythmic thumping that could be attributed to the tyre distortion or potential wheel alignment issues. Any pulling to one side or steering wheel oscillation should be noted, as these symptoms would correlate with the recorded tyre defect and could indicate broader steering or suspension geometry problems.