2004 Mercedes-Benz C 1.8L Petrol · LG54 UCM

A recent failure regarding high CO2 and Lambda emissions, alongside a registration plate lamp defect, highlights a sudden shift in the vehicle's compliance profile following a period of relatively stable testing. While the most recent pass on 5 December 2025 followed a failure just three days prior, the preceding years show a transition from clean certificates to a more frequent accumulation of advisories. This trend suggests that while the vehicle has historically met minimum standards without recorded defects, it is now entering a phase where component wear and emissions-related issues are becoming more apparent in the MOT record. The recorded mileage of 85,651 miles over a 22-year lifespan represents an average annual accumulation of approximately 3,893 miles. This is significantly lower than the typical UK average, suggesting the vehicle has been subject to infrequent use. Mechanically, such a low-mileage profile for a vehicle of this age can mean that while drivetrain components may have lower cumulative wear, other elements like rubber bushes, seals, and suspension components may have been subject to more environmental degradation or stasis than high-mileage counterparts. Prospective buyers should pay close attention to the braking system and suspension, as recent records have flagged several specific areas of concern. The 2024 test noted worn, pitted, or scored rear brake discs alongside thinning brake pads, which can lead to pedal judder or increased stopping distances. Furthermore, the advisory regarding a severely deteriorated offside front anti-roll bar linkage ball joint dust cover indicates potential vulnerability in the steering and suspension geometry. During a test drive, listen for any knocking or clunking sounds when traversing uneven surfaces or turning the steering wheel, as these are common symptoms of worn suspension linkages or deteriorated ball joints. The history also includes an advisory for corrosion on both rear coil springs in 2023. While the 2025 test showed no defects, the presence of spring corrosion warrants a visual inspection for structural integrity and signs of snapping or excessive surface rust. Additionally, the recent emissions failure involving high CO2 and Lambda levels suggests a potential issue with the engine's combustion efficiency or the exhaust after-treatment system. On the road, this may manifest as irregular idling, reduced power under acceleration, or a noticeable change in exhaust note, which should be closely monitored to ensure the recent repairs have fully rectified the underlying cause.