2009 Mercedes-Benz E 2.1L Diesel · DP54 BUS

The most recent DVSA examination on 18 August 2026 returned a pass, although it attracted three advisories relating to corroded front brake pipes, the fitment of under-trays restricting inspection access, and a fluctuating rear service brake. Reviewing the broader history, the vehicle has now passed three consecutive tests but the cumulative advisory record is a cause for measured concern rather than confidence. The same brake pipe corrosion issue has been flagged at every single test since October 2021, indicating a long-standing, unresolved condition rather than a fresh observation. The 2022 failure for a fractured rear coil spring was rectified, but the test from August 2024 recorded rear brake disc wear, thinning rear brake pads, and a binding rear brake, all of which point to a braking system that has been gradually deteriorating. Taken together, the trend is broadly stable on pass-or-fail terms, but the underlying mechanical condition of the braking and underbody components is demonstrably worsening. The recorded mileage of 131,127 miles against a 2009 registration equates to roughly 7,700 miles annually, which is unremarkable for a vehicle of this age. The mileage progression recorded on successive MOT documents appears consistent, with no evidence of significant standing periods or implausibly rapid accumulation between tests. However, a 17-year-old Mercedes-Benz E-Class, even at moderate annual mileage, will have endured considerable cumulative wear on suspension, drivetrain, and interior components. The history shows the car has been used regularly enough to avoid the worst pitfalls of long-term storage, which is a positive, but it has also covered enough ground to require the kind of consumable replacement that the advisories suggest is now overdue or actively required. For a prospective buyer, the most pressing area of attention is the braking system. The recurring advisories concerning corroded brake pipes covered in grease indicate that corrosion is being concealed rather than treated, and any competent pre-purchase inspection should involve jacking the vehicle and physically examining the pipework along its full length, particularly at the unions, mounting clips, and under-tray crossover sections, for advanced surface corrosion, pitting, or weeping. The rear brake disc wear and pad thinning noted in 2024, combined with the fluctuating and binding rear brake observations in 2025 and 2026, warrant a thorough check of the rear calipers for seized slide pins or pistons, as binding calipers on these vehicles are common and accelerate disc wear unevenly. On a test drive, listen for any clunking or rattling from the rear suspension, which could suggest tired bushes, worn top mounts, or a further fractured coil spring given the 2022 failure; the E-Class of this era is also prone to air suspension compressor failure if specified, which would manifest as the vehicle sitting low on startup or after extended standing. Beyond the recorded defects, a buyer should carry out a series of age- and mileage-appropriate physical checks. Inspect the tyres closely for sidewall cracking and perishing, as the 2024 advisory noted rear tyre damage, cracking and perishing, and these symptoms progress even on lightly used cars. Examine the 12 volt battery, as units of this age are well beyond their expected service life and a failing battery can cause erratic electronic behaviour across the vehicle's many control modules. Check the condition and date codes of all fluid systems, including brake fluid, coolant, automatic transmission fluid, and power steering fluid, as calendar-based degradation of these fluids is a common cause of failure on older Mercedes products. Finally, verify the service book stamps and request evidence of recent major items such as cambelt and balancer shaft replacement if applicable, as these are critical and expensive service items on this engine family. A thorough road test should include checking for any transmission hesitation, suspension clonks over uneven surfaces, pulling under braking, and any warning messages on the instrument cluster, given the vehicle's age and the recurring advisories throughout its recent test history.