2012 Mercedes-Benz E 3.0L Diesel · B1 RSK

The 2012 Mercedes-Benz E-Class presents a fully clean MOT history across the most recent five consecutive tests, with the latest examination on 22 January 2026 recording a pass and no advisories, defects, or failures. This unbroken run of clean tests spanning 2022 through early 2026 is a strong indicator that the vehicle has been consistently maintained to a roadworthy standard, with no recurring or escalating issues flagged by the tester. However, a completely clean record over a four-year period on a fourteen-year-old vehicle with substantial mileage should not be interpreted as proof of mechanical perfection; MOT testing is a safety and emissions check rather than a comprehensive mechanical inspection, so the absence of recorded advisories means only that nothing failed on the day. The overall trend is one of stability, though it relies on the assumption that the vehicle has received proper routine servicing between tests, which should be verified through service documentation. The recorded mileage of 149,872 miles across approximately fourteen years equates to an average of around 10,700 miles annually, which is broadly typical for a vehicle of this age and segment. There are no obvious gaps in the MOT record to suggest extended periods of standing, and the consistent year-on-year testing implies regular use. That said, the cumulative mileage places this E-Class firmly in higher-wear territory, where mechanical components such as suspension bushes, coil springs, brake discs, calipers, drive belts, and timing chain components (if petrol) or injector and turbo components (if diesel) will have accrued significant fatigue. Prospective buyers should be particularly mindful that components deemed serviceable at the time of MOT may still be approaching the end of their functional life, especially given the mileage. Given the clean MOT record and the absence of any advisories to investigate, the buyer should focus on age and mileage-related wear items that fall outside the scope of standard MOT testing. Tyre condition warrants close physical inspection, as the sidewalls of tyres fitted to a 2012 vehicle can suffer from perishing and cracking due to environmental exposure, even if the tread depth remains within legal limits; any signs of dry rot or sidewall damage warrant immediate replacement regardless of tread. Brake discs are prone to corrosion and lipping from general use, and on a high-mileage Mercedes the discs may be nearing the end of their service life, so they should be checked for excessive run-out, scoring, or minimum thickness. The 12V battery in particular deserves attention, as Mercedes-Benz vehicles of this era have complex electronic systems that place heavy demand on battery health, and a failing battery can cause erratic electrical behaviour; a load test or voltage check is advisable. Additionally, a thorough inspection should include verification of recent fluid changes, particularly engine oil, brake fluid, coolant, and transmission fluid, as these degrade with time irrespective of mileage. Brake fluid is hygroscopic and should be renewed every two to three years to prevent moisture ingress and reduced braking performance, while coolant systems on this generation of Mercedes are known to be sensitive to condition. On a test drive, listen for any suspension clonks or knocks over uneven surfaces, which could indicate worn bushes or anti-roll bar drop links, and pay attention to steering feel for any vagueness or knocking that might suggest worn tie rods or wishbone bushes. Check for any evidence of fluid leaks beneath the vehicle, particularly around the front suspension turrets, rear differential (on 4MATIC variants), and engine sump. Finally, ensure that the service book and any accompanying invoices corroborate the clean MOT history with evidence of regular oil changes, filter replacements, and major items such as brake fluid, spark plugs, and air filter being addressed at appropriate intervals.