2009 Mercedes-Benz C 2.1L Diesel · KV59 FFB

The vehicle remains roadworthy, though the maintenance trend shows a shift from clean records to emerging mechanical concerns. The most recent test in March 2025 at 162,582 miles identified a non-excessive oil leak and corrosion on the rear sub-frame. While these issues did not result in a failure, the presence of structural corrosion indicates that the vehicle is beginning to show signs of age-related wear that was not present in previous inspections. The mileage pattern is consistent with a 17-year-old vehicle, averaging approximately 9,500 miles per year. There is a notable gap in the records between September 2020 and January 2022, during which the car covered only about 7,600 miles. Since then, the usage has remained steady, with roughly 10,000 miles covered annually between the 2022 and March 2025 tests. This regular interval suggests consistent use, which is generally beneficial for preventing seals from drying out compared to long periods of standing. A buyer must conduct a thorough physical inspection of the rear sub-frame to ensure the corrosion noted in 2025 has not progressed toward a structural weakness. The tester also flagged an oil leak during the latest inspection, which requires a close look to determine if the source is a simple valve cover gasket or a more significant seal failure. Given the age and mileage, the condition of the suspension bushes and control arms should also be checked for tearing or play, as these are common points of failure on this model at high mileages.